7pcs Masonry Drill Bit Set 3mm to 12mm Concrete Drill Bit Set Hex Shank 20mm X 16mm X 200mm Installed on the glass door

Installed on the glass door

6mm round shaft can be push on it easily

): 18mm / 0

The pinion motor gear is made of 45# Steel

7pcs Masonry Drill Bit Set 3mm to 12mm Concrete Drill Bit Set Hex Shank 20mm X 16mm X 200mm Installed on the glass door1. Made of quality carbide YG6X, the rust resistant treatment and reinforced head prevent the drill from cracking and provide longer service life. 2. Four blade design, small incision resistance and small incision resistance. The U shaped groove drill design can effectively remove debris and improve your work efficiency. 3. 1 4 inch Hex Shank Masonry Drill Bit for most common drills, power drills, hand drills and bench drills, easy to install and