Uncle Mike's Hammer Extension slip over hard-to-reach or hard-to-cock hammers for extra leverage. A must for scoped guns with external hammers. Blued steel, knurled surface for easy gripping. Fits most hammer-type guns, either right or left side (Allen wrench included). For all Marlin Lever Actions made in 1983 or later, including 39A, 39M, 1894, 1894C, 1895S, 336C, 336T, 375, 444S, Glenfield 30A..