Description:Features:These Diamond Bits are Capable of Drilling into Extremely Hard Materials Such as Stone and Glass. Use a Low Speed Setting and Proper Cooling, Such as Water, to Ensure Longer Lasting Life.Specification:Brand: StonegoMaterial:......

1. Made of cemented carbide, with reinforced cutter head, which can prevent the drill from cracking and prolong its service life. This twist triangle drill suitable is for concrete, glass, plastic, wood, ceramic tile, aluminum alloy, etc. 2....