SPECS: 416 stainless steel pins. .900” (22.8mm) long, .154" (3.91mm), .155" (3.93mm), or .170" (4.31mm) diameter. Set includes (1) hammer pin, (1) trigger pin, (2) screws, (2) anti-rotation links, hex wrenches, and installation tool. Anti-Rotation Links - Steel, Parkerized finish. Retaining Screws - Steel, black oxide finish. 3.95mm Reamer - Steel. .1555" (3.95mm) diameter cut.