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PROTO JCS-MAS-1A Master Set, 246 Pieces, Metric/SAE, 1/4 in and 3/8 in Drive - Tool Only Sets
PROTOTool Only Sets

PROTO JCS-MAS-1A Master Set, 246 Pieces, Metric/SAE, 1/4 in and 3/8 in Drive

The PROTO Master Set (SKU JCS-MAS-1A, MPN JCS-MAS-1A) is a tool-only set comprising 246 total pieces in Metric and SAE sizes with 1/4 in and 3/8 in socket drive sizes. The set includes (1) Needle Nose Plier, (5)…

SKU 3G-OTH-267194

Also listed as: JCSMAS1A · JCS MAS 1A

Brand
PROTO
Item
JCS-MAS-1A Master Set, 246 Pieces, Metric/SAE, 1/4 in and 3/8 in Drive
Category
Tool Only Sets
Available to Order
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

PROTO
Manufacturer Part Number
JCS-MAS-1A

Technical Documents

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PROTO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The PROTO Master Set (SKU JCS-MAS-1A, MPN JCS-MAS-1A) is a tool-only set comprising 246 total pieces in Metric and SAE sizes with 1/4 in and 3/8 in socket drive sizes. The set includes (1) Needle Nose Plier, (5) Cabinet Screwdrivers, (38) Bit Sockets, and (3) Adjustable Wrenches.

Frequently Asked Questions

What is the PROTO Master Set JCS-MAS-1A used for?

The PROTO Master Set is a 246-piece tool set for industrial maintenance, repair, and assembly. It includes Metric and SAE sockets with 1/4 in and 3/8 in drives, plus pliers, screwdrivers, and wrenches, making it suitable for automotive, manufacturing, and facility applications.

What are the specifications of the PROTO Master Set JCS-MAS-1A?

The PROTO Master Set (MPN JCS-MAS-1A) contains 246 total pieces in Metric and SAE sizes with 1/4 in and 3/8 in socket drive sizes. Included are (1) Needle Nose Plier, (5) Cabinet Screwdrivers, (38) Bit Sockets, and (3) Adjustable Wrenches. It is a tool-only set.

Where to buy the PROTO Master Set JCS-MAS-1A worldwide?

3G Electric supplies the PROTO Master Set JCS-MAS-1A to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this 246-piece tool set.

How to select the right PROTO Master Set for industrial use?

When selecting a PROTO Master Set, consider the socket drive sizes (1/4 in and 3/8 in) and whether you need Metric or SAE fasteners. The JCS-MAS-1A covers both systems with 246 pieces including pliers, screwdrivers, and wrenches. For heavy-duty applications, verify tool material and warranty.

Used in

Common applications for PROTO
Automotive assembly — PROTO J72102 impact socket set for fastening lug nuts on production lines
Heavy equipment maintenance — PROTO J3772T flare nut wrench for hydraulic line fittings on excavators
General industrial repair — PROTO J795SA adjustable wrench set for tightening bolts on conveyor systems
Aerospace manufacturing — PROTO J5240A slotted bit socket for adjusting fasteners in confined spaces
Oil and gas pipeline work — PROTO J5438 12-point socket for valve assembly in refineries
Construction site toolkits — PROTO J8179-T500 double box wrench for structural steel bolting

PROTO Products

3G Electric supplies PROTO tool only sets. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
This 15-piece metric combination wrench set from PROTO covers sizes from 7 mm to 21 mm. Each wrench features a 12-point box end and an open end, with a satin finish on alloy steel. The set is supplied in a canvas pouch for storage and portability. Suitable for tightening and loosening fasteners in mechanical assembly and repair tasks
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This 15-piece metric combination wrench set from PROTO covers sizes from 7 mm to 21 mm. Each wrench features a 12-point box end and an open end, with a satin finish on alloy steel. The set is supplied in a canvas pouch for storage and portability. Suitable for tightening and loosening fasteners in mechanical assembly and repair tasks
This 10-piece metric combination wrench set features 12-point openings for improved grip on hex fasteners. Made from alloy steel with a satin finish, the wrenches cover sizes from 10 mm to 19 mm. Suitable for tightening and loosening metric bolts and nuts in mechanical assembly and maintenance tasks. Includes a canvas pouch for storage
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This 10-piece metric combination wrench set features 12-point openings for improved grip on hex fasteners. Made from alloy steel with a satin finish, the wrenches cover sizes from 10 mm to 19 mm. Suitable for tightening and loosening metric bolts and nuts in mechanical assembly and maintenance tasks. Includes a canvas pouch for storage
This 11-piece SAE 12-point combination wrench set from PROTO features alloy steel construction with a chrome finish. Head sizes range from 3/8 in to 1 in. The set is non-sparking, making it suitable for use in environments with flammable gases or dust. Typical applications include tightening and loosening fasteners in industrial maintenance, automotive repair, and mechanical assembly
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This 11-piece SAE 12-point combination wrench set from PROTO features alloy steel construction with a chrome finish. Head sizes range from 3/8 in to 1 in. The set is non-sparking, making it suitable for use in environments with flammable gases or dust. Typical applications include tightening and loosening fasteners in industrial maintenance, automotive repair, and mechanical assembly
This 15-piece metric combination wrench set from PROTO features 12-point openings for improved grip on hex fasteners. The satin finish provides corrosion resistance. Wrenches range from 7 mm to 32 mm and are stored in a canvas pouch. Suitable for tightening and loosening metric fasteners in industrial maintenance, automotive repair, and mechanical assembly
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This 15-piece metric combination wrench set from PROTO features 12-point openings for improved grip on hex fasteners. The satin finish provides corrosion resistance. Wrenches range from 7 mm to 32 mm and are stored in a canvas pouch. Suitable for tightening and loosening metric fasteners in industrial maintenance, automotive repair, and mechanical assembly
This 10-piece SAE 6-point combination wrench set includes sizes from 7/16 in to 1 in. The wrenches are constructed from alloy steel with a chrome finish for corrosion resistance. A canvas pouch is included for organized storage. Suitable for tightening and loosening fasteners in automotive, industrial, and mechanical applications
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This 10-piece SAE 6-point combination wrench set includes sizes from 7/16 in to 1 in. The wrenches are constructed from alloy steel with a chrome finish for corrosion resistance. A canvas pouch is included for organized storage. Suitable for tightening and loosening fasteners in automotive, industrial, and mechanical applications
This 14-piece SAE 12-point ratcheting combination wrench set includes sizes from 1/4 in to 1 in. The wrenches are made of alloy steel with a chrome finish and feature a 12-point ratcheting box end for faster fastener engagement in confined spaces. Suitable for general bolting tasks in maintenance and repair applications
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This 14-piece SAE 12-point ratcheting combination wrench set includes sizes from 1/4 in to 1 in. The wrenches are made of alloy steel with a chrome finish and feature a 12-point ratcheting box end for faster fastener engagement in confined spaces. Suitable for general bolting tasks in maintenance and repair applications

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This tool-only set includes 1,398 pieces in Metric and SAE sizes with socket drive sizes of 1/2 in, 1/4 in, 3/4 in, and 3/8 in. The set contains a duck bill plier, 19 nut drivers, a drag link socket, and 6 double box wrenches. Suitable for fastening, wrenching, and plier tasks in industrial maintenance and repair
This 215-piece tool-only set includes 98 impact sockets and 10 ratcheting double box wrenches in both Metric and SAE sizes. Sockets feature 1/2 in and 3/8 in drives. Suitable for heavy-duty fastening and loosening in industrial maintenance, automotive repair, and assembly
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This 215-piece tool-only set includes 98 impact sockets and 10 ratcheting double box wrenches in both Metric and SAE sizes. Sockets feature 1/2 in and 3/8 in drives. Suitable for heavy-duty fastening and loosening in industrial maintenance, automotive repair, and assembly
This 453-piece tool-only set includes socket bits, open end wrenches, retaining-ring pliers, and screw starters in SAE sizing. Socket drive sizes are 1/4 in, 3/8 in, 1/2 in, and 3/4 in. Suitable for industrial maintenance, repair, and assembly tasks
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This 453-piece tool-only set includes socket bits, open end wrenches, retaining-ring pliers, and screw starters in SAE sizing. Socket drive sizes are 1/4 in, 3/8 in, 1/2 in, and 3/4 in. Suitable for industrial maintenance, repair, and assembly tasks
This 164-piece SAE master tool set includes 63 sockets, 16 combination wrenches, 6 Phillips screwdrivers, and 2 groove pliers. Socket drive sizes are 1/4 in, 3/8 in, 1/2 in, and 3/4 in. Suitable for maintenance, repair, and assembly tasks in industrial settings
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