Werkzeug Self Centering Hinge Tapper Core Drill Bit Set for Woodworking, Adjustable Door Window Drill Bits with 1 Hex Key & 8 Replacement Drill Bits (

Werkzeug Self Centering Hinge Tapper Core Drill Bit Set for Woodworking, Adjustable Door Window Drill Bits with 1 Hex Key & 8 Replacement Drill Bits (

Center Drill Bit: Werkzueg center drill is made of high speed steel drill bit and quenching treatment shell designed. High hardness, durable and superior drilling performance Satisfy all you demand: Hinge drills come in 8 different sizes: 5/64', 7/64'', 2 of 9/64'', 11/64'', 13/64'', 5mm and 1/4". With 1 hex key and 8 replacement drill bits Excellent Design: Automatic positioning center enhance accuracy and efficiency. Double-sided hole design fast and automatic discharge sawdust from the hole on both sides Multipurpose: Perfect for hinges, handles, drawer slides, woodworking and etc. Suitable for professionals and DIYer Important: Use low speed when drilling (usually keep in 2000r/min to 3000r/min). Too fast speed will off center, break the bit or jammed