Wheeler FAT Wrench

The Wheeler FAT Wrench (Firearm Accurizing Torque) has become the de facto industry standard for gunsmithing torque applications, trusted by professional armorers and home builders alike. This adjustable torque wrench delivers precise control across the 10-65 inch-pound range, covering everything from delicate optic mounting screws to action bedding bolts. The adjustment mechanism allows you to dial in any torque value within the range in fine increments, providing flexibility for diverse fastener specifications.

The driver features a magnetized tip to prevent bits from falling out during use, along with a textured rubber overmold that improves ergonomics and grip while reducing hand strain during high torque applications. The accuracy specification of ±2 inch-pounds up to 40 inch-pounds, and ±5% from 40-65 inch-pounds, meets or exceeds the requirements for proper scope mounting and accessory installation. This level of precision prevents both under-torquing that allows movement and over-torquing that damages components.

The wrench includes 10 bits made from phosphate-coated S2 tool steel hardened to 56-58 Rockwell C, providing durability for repeated use without bit wear or cam-out. The complete kit ships in a convenient plastic storage case that protects the wrench and keeps all components organized. Wheeler also offers digital and auto-torque variants, but the manual FAT Wrench remains the most popular choice for its simplicity, reliability, and proven track record across millions of builds.