HOLEX 7-Piece SAE Long Arm Hex Key L-Wrench Set | 3/32 to 5/16 in. Allen Wrench Set, Chrome Vanadium
Seven long-arm hex keys in inch sizes from 3/32 to 5/16 make up this HOLEX L-wrench set, an allen wrench set in SAE (Society of Automotive Engineers) inch sizes, machined from chrome vanadium steel and through-hardened for durability. The long-arm pattern adds leverage and access on recessed fasteners, which is where inch-size machine screws on imported and domestic equipment alike tend to hide. It earns a place at maintenance benches, machine setup stations, and equipment service kits.
One key of each size is included, from the smallest 3/32 up to the 5/16 that handles larger machine hardware, so every common inch size is on hand before the job starts.
- Chrome vanadium steel, through-hardened for lasting wear resistance
- Manganese-phosphate surface finish resists corrosion with a low-glare working coat
- Angled shank geometry combines a short driving end with a long reach arm
Which work calls for an inch-size allen wrench set?
Inch-standard hex keys cover the set screws and socket-head hardware found across US-built equipment.
Applications: machine and equipment screws in inch sizes, fixture and tooling adjustment, maintenance fastening, assembly of inch-standard hardware, and set screws on couplings and collars.
Industries: maintenance and repair, precision manufacturing, automotive service, equipment building, and facility services.
Users: maintenance technicians, machinists, assemblers, and service technicians.
Which sizes are included in this SAE hex key set?
Seven keys, one per size: 3/32, 1/8, 5/32, 3/16, 7/32, 1/4, and 5/16 in. That progression covers the socket-head cap screws, set screws, and machine screws most common on inch-standard equipment. The set matches the single HOLEX L-wrenches sold as No. 626128, so a lost size can be replaced individually rather than with a new set.
What steel are these hex keys made from?
The keys are chrome vanadium steel and through-hardened, so the hex flats resist rounding under repeated load. Paired with the manganese-phosphate finish, that heat treatment separates a professional L-wrench set from softer keys. The finish gives the keys a distinct dark look that is easy to spot in a mixed drawer.
Why are the end faces squared and chamfered?
Squared end faces mean the key's full hex section engages the fastener socket immediately, and the chamfer guides the key into the socket without shaving the corners of screw or key on entry. The result is cleaner engagement, less cam-out, and longer life for both the fastener and the tool. On small inch sizes such as 3/32, where socket corners are easiest to damage, that end-face preparation is the difference between a clean release and a rounded screw.
