Features Efficient Cooling with Air Holes: The concrete grinding wheel features air holes that maintain and cool the cutting pattern, reducing wear and ensuring efficient performance. High Hardness and Wear Resistance: Crafted from high-quality diamond material, this turbo diamond grinding wheel offers exceptional hardness and wear resistance, ensuring long-lasting grinding capabilities. Versatile Application: Suitable for polishing and grinding various materials, including granite, cement, marble, rock, masonry, and concrete, providing a versatile solution for different projects. Enhanced Durability with Large Segments: Equipped with large grinding segments and a heat-treated steel body, the diamond grinding cup wheel offers increased durability and longevity. 12-Segment Teeth Design: The 12-segment diamond grinding disc allows for dry and wet grinding, effectively processing uneven s with professional results. Features: 1、Made of high-quality hard alloy for good performance, it can make clean and accurate holes for you. which works as a set of glass drills which are very easy to use. 2、The cutting resistance is small with stable function, and the drilling speed is fast, also the boundary is not damaged. 3、Neat opening, smooth, no folds, no tremor, such hand drill accessory can work for easy chipping. 4、Professional glass and tile drills are for smooth, accurate drilling of tiles, marble, porcelain, mirrors and glass. Triangular design reduces drill breakage. And the drill has a carbide tip to extend drill life. 5、Widely applicable, it can be installed in ordinary electric hand drills, bench drills, impact drills, etc. And machine drill clamp range is 10mm and above. Specification: Item Type: Drill bit Material: 45 steel inlaid alloy blade Treatment: Titanium plating Scope of Application: Glass, ceramics Size: Tool Diameter: Approx. 4mm / 0.16in Approx. 5mm / 0.2in Approx. 6mm / 0.24in Approx. 8mm / 0.31in Approx. 10mm / 0.39in Approx. 12mm / 0.47in Length: Approx. 74mm / 2.91in Approx. 75.4mm / 2.97in Approx. 74.2mm / 2.92in Approx. 76.6mm / 3.02in Approx. 82.4mm / 3.24in Approx. 84.4mm / 3.32in Package List: 6 x Drill Bits Note: betweendiv>1. When cutting or drilling, remember to add water to the material to prevent the material from overheating.between/div>betweendiv>2.Dimensional error for ± 2mmbetween/div> Package List 6 x Drill Bits