5pcs Titanium Masonry Drill Bit 12mm Concrete Drill Bit with Hex Shank 5mm X 0.2mm Total Length: 83mm / 3

Total Length: 83mm / 3

in size of: Inner Diameter: 120mm/4

Dimension:460mm x 6mm / 18-1/8 inch x 1/4 inch(L*D)

Where to use: Outdoor (Street parking as well) Indoor

Inner Diameter (before shrink) : 178mm/7-inch

5pcs Titanium Masonry Drill Bit 12mm Concrete Drill Bit with Hex Shank 5mm X 0.2mm Total Length: 83mm / 31. Made of quality carbide YG6X, the rust resistant treatment and reinforced head prevent the drill from cracking and provide longer service life. The oxygen nitriding treatment of the bit head improves the hardness of the bit 2. Concrete Drill Bits are designed with a U shaped chip discharge groove. This design ensures that all drill dust and chips are collected and released from the drill bit. 3. This 1 4 inch hex shank drill bits can be used on