Cammed head for anti-spin in frame, offset is .003 from center

Barrel: .2495 dia x .485 long

Head is .475

Hex is 3/32nd

Stainless Steel

Will fit any domestic made Hoback Knives from 2013 on, and some Hoback Knives from late 2012, except the MK Ultra, OSF, and A8 Slimline.