4pcs Titanium Masonry Drill Bit Set 6mm to 12mm Concrete Drill Bit W Hex Shank 1mm(ID)x2mm(OD)x500mm(L) Resistance: 3

Resistance: 3

Screw Size: M4 x 25mm/M4 x 1"(D*L)

Iron constructed with Zinc Plated finish

Made of stainless steel material

The Base Overall Size: 14

4pcs Titanium Masonry Drill Bit Set 6mm to 12mm Concrete Drill Bit W Hex Shank 1mm(ID)x2mm(OD)x500mm(L) Resistance: 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