6-in-1 Screwdriver - Rubber Triangular Grip Features: 6 Functions: 1/4" & 5/16" nutdrivers, #1 & #2 Phillips® bits, 3/16" & 1/4" slotted bits.Chrome vanadium steel bits with ball and spring retention.Power Pro Grip® Handle - Co-molded, non-slip, rubber triangular handle for maximum turning.1/4"& 5/16" hex shanks