Brand New & High Quality Good Performance and long life for making clean and 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. a Low Speed Setting and Proper Cooling, Such as Water, to Lasting Life. Color: Silver With any Drill or Tool Superior Performance - Cut Holes in Marble, Slate, Glass, Tile, Stone, etc... Great , Hobby, Craft, Construction, etc... Material: metal 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 the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.