Werkzeug Self Centering Hinge Tapper Core Drill Bit Set for Woodworking, Adjustable Door Window Drill Bits with 1 Hex Key & 8 Replacement Drill Bits (5/64-1/4 Inches), 16 Pieces

• Centre drill bit: tool centre 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", 5 mm and 1/4". With 1 hex key and 8 replacement drill bits
• Excellent design: automatic positioning centre enhances 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 DIYers
• Important: use low speed when drilling (usually keep in 2000r/min to 3000r/min). Too fast speed will off centre, break the bit or jammed

Features: Suitable for most general purpose electric drills B. Efficient and accurate positioning C. Upgrade 135° inclined blade drill bit D. Double-sided hole discharge sawdust design. Comes with 8 replacement bits: when the drill bit is damaged, just need replace it that can continue to use. Disassembly step. 1. Prepare the centre drill bit and hex key. 2. Rotating the hex key 3. Grab the top of the bit and unscrew the shell (just like twist the lid off the drink). 4. If you need to replace the drill bit, just need remove the broken bit and install the replacement bit "warm tips". Use low speed when drilling (usually keep in 2000r/min - 3000r/min). Too fast speed will off centre, break the bit or jammed - When drilling the hole, please adjust according to the hardness of the wood. If the wood is soft, you can choose the smaller centre drill bit. If the wood is hard, you can choose the corresponding or bigger one - if you can't get the centre drill bit out after drilling, use the hex key to separate the drill bit. Package includes: 8 x tool centre drill bits (5/64", 7/64", 9/64" x 2, 11/64", 13/64", 5 mm and 1/4") (with case). *Hex Key 8* Replacement drill bits tool – your professional tool house we are committed to providing the best quality products, and largely dependent on product feedback from wonderful customers such as yourself. If you have any questions or concerns about our product, please do not hesitate to contact us, we always here to service you.