Bosch BL2144 - Black Oxide 1-Piece 17/64 in.

Speed helix design for three times faster drilling than standard bits. Last 50 percent 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