Mosaic & Pebble -8/9Pc Self-Centering Hinge Drill Bit For Adjustable Door 8 Pieces Woodworking Highlights Brand Generic 8/9Pc Self-Centering Hinge Drill Bit For Adjustable Door 8 Pieces Woodworking Description: Made of high speed steel drill bit, high hardness, durable and superior drilling performance. Center drill size - various sizes: 5/64', 7/64'', 9/64'', 11/64'', 13/64'', 5mm and 1/4''. With 1 hex key. ACCURACY AND EFFICIENCY - Automatic positioning center improves accuracy and efficiency. Holes design on both sides - quick and automatic discharge The sawdust from the holes on both sides. MULTI-APPLICATIONS - High precision drill bits are used to drill precise pilot holes in cabinet and door hinges, door lugs, handles, drawer slides, woodworking, etc. The standard 1/4" hex shank fits all jaw chucks and quick change chucks. EASY TO USE - Self-centering drill bit set allows for quick bit changes without re-skilling or the need for tools. Fast, one-handed loading and releasing. Specification: Material: Galvanized Aluminum Shell, High Speed Steel Core, Hex Iron Handle Color: Silver Package Include: 8/9pcs Hinge Self Centering Drill Bit Set Note: Due to the difference between different monitors , the picture may not reflect the actual color of the item. Due to manual measurement, there may be an error of 1-2mm in size.