1. The product has 5 internal specifications: 0#, 1#, 2#, 3#, 4#.
2. Product material: HSS HSS.
3. Specifications applicable range: 0# for 2mm-4mm, 1# for 3mm-5mm, 2# for 4mm-8mm, 3# for 5mm-10mm, 4# for 6mm-12mm.
4. Features of the product: This drill can be used with a power drill to quickly disassemble broken screws, tubes, and tack, etc. The 2-12mm broken screw can be removed.