· Precision milled brad-Point drilling tip for perfet self-centring, accurate positioning and fast drilling holes · Engineered double cutting edges and extra-wide flutes deliver fast chip removal for smooth and clean holes · 7/16-inch integral impact hex shank, compatible with 1/2-inch quick changeable chucks drills and impact drivers · Suitable for wood, beech, walnut, elm, fiberboard, particleboard, plywood, plastic, PVC, MDF, acrylic, nylon, PU, Acrylic, rubber etc. · Packed in storage box