New & High Quality Good Performance and Excellent for making clean and accurate hole on glass and tile Works better with a electric drill (Excluding in the item) 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 Longer Lasting Life. Color: Silver Use With any Drill or Power Tool Superior Performance - Cut Holes in Marble, , Glass, Tile, Stone, etc... Great for Home, Hobby, Craft, Construction, etc... Material: metal Hole Saw Diameters: 3mm/0.12 inch , 4mm/0.16 inch , 5mm/0.20 inch , 6mm/0.24 inch , 8mm/0.31 inch , 10mm/0.39 inch , 12mm/0.47 inch , 18mm/0.71 inch , 32mm/1.26 inch , 50mm/1.97 inch Package Contents: 1 Piece 3mm Diamond Drill Bit 1 Piece 4mm Diamond Drill Bit 1 Piece 5mm Diamond Drill Bit 1 Piece 6mm Diamond Drill Bit 1 Piece 8mm Diamond Drill Bit 1 Piece 10mm Diamond Drill Bit 1 Piece 12mm Diamond Drill Bit 1 Piece 18mm Diamond Drill Bit 1 Piece 32mm Diamond Drill Bit 1 Piece 50mm Diamond Drill Bit Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.