Detail 1 Set Diamond Cutting Discs Cutting Wheel Set & 1 Set Bur Diamond Grinding Head Burr Set Rotary Tool Grit Bit1 Set Grinding Needle With Plastic Box And 10pcs Diamond DiscsHigh hardness, wear resistance and excellent impact resistance1 set several applications in one (stone, jade, ceramic, glass, etc.)Home: Stone/Jade/Ceramic/Glass/HM/Cutting/Grinding/EngravingPremium type diamond coated in GRIT 120 (medium), more durable than ordinary diamond coated burr. Use with water as grease is betterSuitable for use in sanding the edges of glass, marble, rock or jewelry. And apply to drilling glass, shell, tile and stone. Model: 7pc solid wheels, 3pc Holed wheels Color: as shown Material: steel and diamonds Grinding needle size: 14.5x6.1 x 2.cm Diamond saw blades handle diameter: 3mm Saw blade diameter:16mm (1 piece)19mm (2 pieces)20mm (1 piece)22mm (2 pieces)25mm (2 pieces)30mm (1 piece)40mm (1 piece)Package Contents:30 x Grinding Needles1 x Plastic Box10 x Diamond Saw BladesOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.