For drilling in wood and light sheet metal. •Drilling speed relative to pressure applied. •Chips can be brought easily out of the hole. •This bit is excellent for tough woods and thick obstacles •Screw point for easy starting and pulling through wood. •With screw point removed, this bit can be ground to function like a standard combination bit. •Proven in the field to deliver accurate and professional results in many applications. •Bits range from 3/16" to 1" (4.8 to 25.4 mm) in diameter and in shaft length from 12" to 72" (304.8 to 1828.8 mm). •The D'VersiBIT System makes it possible to easily accomplish even complex installations. •This patented system attaches a quality drill bit to a long flexible spring steel shaft. •When used with the Placement Tool, this flexibility makes it possible to easily manipulate the bit within walls. •After drilling, attach a D'VersiGRIP to the hole in the drill and pull wire or cable back through the wall.