The adjustable hole saw cutter can be used for many kinds materials, such as wood, plastic, rubber, light metals, etc.

Package Includes:
1 x Circle hole cutter
1 x Drill bit
1 x Hex wrench

NOTE:
1. Please make sure all the screws on it are tightened before use.
2. Please make sure the two sides are equal in distance, otherwise the force will be uneven.
3. Please use the hex wrench to tighten the screws when you want to adjust the cutting size.
4. Please turn off power when you replace the drill.
5. Cutting speed must be slow for your safe, and make sure there isn't iron, nails or other metal material in the item you will cut.
6. Don't use it on steel plates or other metal materials.
7. Please DO NOT drill holes backwards on the ceiling. Only suggest cut holes from top down.
8. Please use special tools to clean the chippings, don't use hand to avoid being injured.