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The PROTO J1223MASD is a combination wrench designed for professional use in mechanical, industrial, and maintenance applications. It features a 23 mm open and box end configuration with a 15-degree offset head angle, making it suitable for work in tight or recessed fastener locations. The box end is 12-point, allowing engagement in confined spaces where full rotation is not possible. The wrench measures 12-7/8 inches overall and is constructed from steel with a satin finish that reduces glare and resists corrosion. It meets ASME B107.100 standards and carries a lifetime warranty. Licensed trades and industrial technicians working on heavy equipment, piping, and structural assemblies will find this wrench a reliable hand-tool choice.
The J1223MASD is suited for use in residential, commercial, and industrial settings where metric fasteners are standard. The tether-capable design supports use in elevated work environments or drop-hazard zones, such as utility towers, scaffolding, aerial lifts, and overhead mechanical rooms. The straight handle and fixed offset head make it a standard pick for mechanics and millwrights maintaining equipment with 23 mm fasteners. It is not ratcheting and not magnetic, keeping the design simple and durable for high-frequency use.
Designed for use with standard 23 mm metric fasteners. Compatible with any application requiring a 12-point combination wrench meeting ASME B107.100 specifications.
This wrench is installed and used by licensed mechanics, millwrights, electricians, and maintenance technicians working on metric-fastened assemblies. Before servicing any equipment, de-energize electrical systems and relieve hydraulic or pneumatic pressure per applicable safety procedures. When working at height, secure the wrench using an approved tether anchor point to comply with tool tethering requirements at the job site. Inspect the wrench for cracks or deformation before each use and do not use a cheater bar or extension on the handle.
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