Proto JSCR10T Combination Wrench 5/16 Inch Ratcheting

Product Description

The PROTO JSCR10T is a 5/16-inch combination wrench built for trade professionals who need a compact, reliable hand tool for fastener work in tight spaces. The wrench features a 12-point box end with a ratcheting mechanism and a 0-degree head offset, allowing use in confined areas where swing arc is limited. At 5.5 inches overall length and a head thickness of 1/8 inch, it is sized for smaller fasteners common in HVAC, plumbing, and electrical work. Constructed from steel with a corrosion-resistant chrome finish, it meets ASME standards and is tether capable for use in elevated or safety-critical work environments.

This wrench is suited for residential and commercial service work where a small-profile combination wrench is needed to drive or loosen 5/16-inch fasteners. The ratcheting box end speeds up repetitive fastening without repositioning the wrench on each stroke. The tether-capable design makes it appropriate for rooftop HVAC work, elevated mechanical platforms, or any application where dropped-tool prevention is required by site safety policy. The straight handle and compact overall length allow access in equipment panels and tight mechanical spaces.

Key Features

• Ratcheting 12-point box end for faster fastener driving without repositioning
• 5/16-inch head size with 0-degree offset for low-clearance applications
• Tether capable for compliance with dropped-tool prevention requirements
• Corrosion-resistant chrome finish meets ASME standards
• Compact 5.5-inch overall length with 1/8-inch head thickness
• Steel construction with straight handle for controlled torque application

Compatibility

Designed for use on standard 5/16-inch fasteners in HVAC, plumbing, electrical, and general mechanical service applications where a compact ratcheting combination wrench is required.

Installation Notes

This wrench is a general-use hand tool installed or carried by any trade professional as part of a standard service kit. Before beginning fastener work, de-energize electrical equipment and isolate any pressurized systems per applicable NEC, IFGC, or IPC requirements. Attach a compatible tether to the tether point when working at height or in areas where dropped tools present a safety hazard. Inspect the ratcheting mechanism before use and do not use the wrench as a striking or prying tool.