Wheeler Firearm Accurizing Torque (F.A.T.) Wrench- wheeler manual firearms accurizing torque wrench kit ,Jim Clary reviews the Wheeler Firearm Accurizing Torque (F.A.T.) Wrench By Mary and Dr. Jim Clary Illustration courtesy of Wheeler Engineering. Prior to 2010, I would have probably said that this tool was not necessary for the average shooter.Wrenches & Screwdrivers | Wheeler43 Piece Professional Gunsmithing Screwdriver Set. $44.99. Add to Cart. Quick View. Wheeler 55 Piece SAE/Metric Hex and Torx Screwdriver Set. $49.99. Add to Cart. Quick View. Delta Series AR Combo Tool with Torque Wrench.