Feature
1. Suitable for most general purpose drills
2. Efficient and accurate positioning
3. 2 holes design can exhaust sawdust faster

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.

TIPS:
* 5/64" bit can drill a hole(hole diameter is 2mm) for screws whose diameter is 2.2-2.8mm;
* 7/64" bit can drill a hole(hole diameter is 2.8mm) for screws whose diameter is 3-3.5mm;
* 9/64" bit can drill a hole(hole diameter is 3.5mm) for screws whose diameter is 4-4.5mm;
* 11/64" bit can drill a hole(hole diameter is 4.5mm) for screws whose diameter is 5-5.5mm;
* 5mm bit can drill a hole(hole diameter is 5mm) for screws whose diameter is 5.5-6mm;
* 13/64" bit can drill a hole(hole diameter is 5.2mm) for screws whose diameter is 6-6.5mm;
* 1/4" bit can drill a hole(hole diameter is 6.35mm) for screws whose diameter is 7-7.5mm;

Package Included
1 * 8Pcs Self Centering Hinge Drill Bit Set(5/64', 7/64'', 2*9/64'', 11/64'', 13/64'', 5mm and 1/4")
1 * hex wrench