These pocket size Tool Kits includes a built in spanner wrench, which makes it very easy to hold both the wrench and the knife at the same time while making pivot adjustments. The head unscrews from the main body, which contains a precisely machined screw driver blade that matches the slot on the pivot screw of the XM-18. The XM Models male dead will also hold any standard 1/4â€³ bit for the handle screws. The XM Model comes with a 5/64" bit for the 3.5" XM-18 and the XM-24. The crossed drilled hole in the male end is there so you can use it as a â€œTâ€ handle for extra torque. These are made from 17-4 PH hardened stainless steel, with a bead blast finish.