Home » cordless-drill-drivers » What kind of bits can a keyless chuck hold? What kind of bits can a keyless chuck hold? Chris 29th February 2020 What kind of bits can a keyless chuck hold? Shop for Cordless Drill Drivers Providing it is the correct size, a keyless chuck with 3 jaws can accept bits with hexagonal or straight shanks. What is the shank? The shank is the part of a bit (such as a drill bit, screwdriver bit or bit holder) that is actually gripped by the chuck. Screwdriver bits and bit holders usually have hexagonal shanks and drill bits usually have straight shanks.