Draper-53871-Step-Drill-Bit-4-30mm-Draper-53871-Step-drill-bit-with-2mm-increments-perfect-for-drilling-into-steel-brass-copper-aluminium-wood-&-plastics-Manufactured-from-good-quality-high-speed-steel-correctly-hardened-for-a-long-life-Drill-steps-marked-at-graduations-4-6-8-10-12-14-16-18-20-22-24-26-28-30mm-Display-packed-br-Draper-53871-Step-Drill-Bit-4-30mm