SPEED HELIX DESIGN FOR THREE TIMES FASTER DRILLING THAN STANDARD BITS LAST 50% LONGER THAN HIGH-SPEED STEEL EASIER DRILLING, REDUCED HEAT AND EXTENDED DRILL BIT LIFE AVAILABLE IN JOBBER LENGTH, STUBBY LENGTH, EXTENDED LENGTH (AIRCRAFT), 1/2 IN. REDUCED SHANK (SILVER AND DEMING) FOR USE IN STEEL, COPPER, ALUMINUM, BRASS, OAK, MAPLE, MDF, PINE, PVC, POLYCARBONATE, ACRYLIC, ABS, NYLON AND COMPOSITE MATERIALS