BOSCH Aircraft Drill Bits-Extra Length, 1/4"Dia, 6"L, BLK Oxide

Bosch bl2643 aircraft drill bits-extra length, 1/4"dia, 6"l, blk oxide features 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.