Thread does not slip replaceable drill bit, high speed drilling in cement (3mm)
Use of this product for cement brick wall ,a thin iron plate ceramic tile (need to add water) Drilling one the mold:both for home decoration decoration use,installation screws.
1.Hexagon screwdriver to instal the first elecrtic drill on
2.in the casing installed to hex screwdriver bit ,and then drilll a hole in the wall consrtuction
3.drilling completed remove the casing after the hexagonal screwdriver bit and then drill into the screw within the walls the construction can be completed.