The Short Action Customs Action Wrench Head is made to use with the SAC Action Wrench and is cut to fit specific actions. The are precision-engineered to ensure proper torque application and protecting your firearm from damage. They are made from heat treated a36 tool steel and finished in black nitride coating. CompatibilityModel 1*: Remington 700 & Model 7, Christensen Arms, Defiance (except Elite), Impact 737, Bergara B14, Stiller Predator, Falkor Defense LW7 and 7EVENModel 2: Winchester M70, FN SPR, Springfield 1903, Defiance GA Hunter Controller Round FeedModel 3: American Rifle Company MausingfieldModel 4: BAT Machine VR, TR, Hammerhead, Igniter, Vesper, HR, Bumblebee, Vampire, DS, B (NOT Nuevo)Model 5: Tikka T3Model 6: Savage 10/110 long-shank, Howa 1500 & Vanguard, Borden, Kelbly'sModel 7: Zermatt Bighorn TL/SR/Origin/Ti, RimX, Gunwerks GLR, Savage small-shankModel 8: American Rifle Company Nucleus/Archimedes, Daniel Defense Delta 5 Pro, Winchester XPRModel 9: Curtis Custom ...