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PROTO JCS-MAS-3A Master Set, 215-Piece, Metric/SAE, 1/2 in and 3/8 in Drive - Tool Only Sets
PROTOTool Only Sets

PROTO JCS-MAS-3A Master Set, 215-Piece, Metric/SAE, 1/2 in and 3/8 in Drive

The PROTO Master Set (MPN JCS-MAS-3A) is a tool-only set comprising 215 total pieces in Metric/SAE sizes with 1/2 in and 3/8 in socket drive sizes. It includes 98 impact sockets and 10 ratcheting double box wrenches…

SKU 3G-OTH-267202

Also listed as: JCSMAS3A · JCS MAS 3A

Brand
PROTO
Item
JCS-MAS-3A Master Set, 215-Piece, Metric/SAE, 1/2 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-3A

Technical Documents

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

Product Description

The PROTO Master Set (MPN JCS-MAS-3A) is a tool-only set comprising 215 total pieces in Metric/SAE sizes with 1/2 in and 3/8 in socket drive sizes. It includes 98 impact sockets and 10 ratcheting double box wrenches, all from the PROTO brand.

Frequently Asked Questions

What is the PROTO Master Set JCS-MAS-3A used for?

The PROTO Master Set JCS-MAS-3A is used for heavy-duty fastening and loosening in industrial maintenance, automotive repair, and assembly. Its 215 pieces include 98 impact sockets and 10 ratcheting double box wrenches in Metric/SAE sizes, making it suitable for demanding mechanical work.

What are the specifications of the PROTO Master Set JCS-MAS-3A?

The PROTO Master Set JCS-MAS-3A contains 215 total pieces, including 98 impact sockets and 10 ratcheting double box wrenches. It offers both Metric and SAE sizes with 1/2 in and 3/8 in socket drive sizes. The set is tool-only and manufactured by PROTO.

Where to buy the PROTO Master Set JCS-MAS-3A worldwide?

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

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

To select the right PROTO Master Set, consider the socket drive sizes and piece count needed for your tasks. The JCS-MAS-3A offers 1/2 in and 3/8 in drives with 98 impact sockets for high-torque applications. Ensure the set includes both Metric and SAE sizes to cover common fasteners.

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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This 13-piece metric wrench set includes sizes from 7 mm to 19 mm, each with a 12-point ratcheting box end for faster fastener turning in confined spaces. The wrenches are constructed from alloy steel with a chrome finish and come organized in a tool roll for storage. Suitable for general maintenance and repair tasks on machinery and equipment
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This 13-piece metric wrench set includes sizes from 7 mm to 19 mm, each with a 12-point ratcheting box end for faster fastener turning in confined spaces. The wrenches are constructed from alloy steel with a chrome finish and come organized in a tool roll for storage. Suitable for general maintenance and repair tasks on machinery and equipment
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 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 9-piece SAE 12-point ratcheting combination wrench set includes sizes from 9/32 in to 3/4 in. The wrenches feature a chrome finish and a ratcheting box end for faster fastener turning in confined spaces. Suitable for tightening and loosening fasteners in mechanical assembly and maintenance tasks
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This 9-piece SAE 12-point ratcheting combination wrench set includes sizes from 9/32 in to 3/4 in. The wrenches feature a chrome finish and a ratcheting box end for faster fastener turning in confined spaces. Suitable for tightening and loosening fasteners in mechanical assembly and maintenance tasks
This set includes 12 alloy steel combination wrenches with a black chrome finish, ranging from 8 mm to 19 mm. Each wrench features a 12-point ratcheting box end for faster fastener turning in confined spaces. The set is organized in a tool roll for storage and transport. Suitable for tightening and loosening metric fasteners in mechanical assembly and maintenance tasks
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This set includes 12 alloy steel combination wrenches with a black chrome finish, ranging from 8 mm to 19 mm. Each wrench features a 12-point ratcheting box end for faster fastener turning in confined spaces. The set is organized in a tool roll for storage and transport. Suitable for tightening and loosening metric fasteners in mechanical assembly and maintenance tasks

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