Hole Saw Guidance - The Pilot Drill Bit drills the pilot hole in order to guide the hole saw into position. Use this pilot bit when cutting holes through a wide variety of materials. It is suitable for use with all corded and cordless drill drivers. For use with the Bosch Power Change Plus keyless arbor: offering accuracy and robustness. Features and Benefits • Hole Saw Guidance • Pilot Drill Bit drills the pilot hole in order to guide the hole saw into position • Pilot bit cuts holes through a wide variety of materials Specifications Diameter: 7,15mm Shank, shape: Hexagon Shank type: Hexagon Total length: 85mm Application materials: Metal pipes and profiles; Plastics; Wood with metal; Drywall