22Pcs Self Centering Hinge Drill Bit Set,Self Centering Hinge Tapper Core Hole Puncher 5/64'' 7/64'' 9/64'' 11/64'' 13/64'' 5mm 1/4'' & 1 Pcs Hex Key & 10 Pcs Replacement Drill Bits +1 Center Punch

Feature 1. Suitable for most general purpose drills 2. Efficient and accurate positioning 3 double face with exhaust sawdust design 4. There are 10 high quality replacement drill bits: when the drill bit is damaged, only need to replace the drill bit that can continue to be used. Disassembly step 1. Prepare the center drill bit and hex wrench 2. Rotating hex wrench 3. Hold the top of the drill and gently rotate to unscrew the outer casing. 4. If you need to change the drill bit, just remove the broken drill bit and install the replacement drill bit. Package Included 10 *  Center Drill (2*5/64', 2*7/64'', 2*9/64'', 11/64'', 13/64'', 5mm and 1/4") 10 *Replace the drill bit 1 * hex wrench 1 * center punch