Knurling and matte black: how the grip comes together
Knurling is a machinist's technique: a fine crosshatch rolled or cut into metal so that oily or sweaty hands still grip. Toolmakers have used it for well over a century on screwdriver handles, micrometer thimbles and lathe fittings, and on this Pakistan butterfly knife it does the same job on both 12.7 cm handles while the knife turns through a flip.
Folding knives of this kind are assembled from separately finished parts: the stainless drop-point blade, the two handles and the pivot pins that join them. The matte black finish gives a stealthier look than polished chrome and hides fingerprints; it is the quieter alternative to the chrome version of the same knife.
