4 pcs 1 mm Metric Diamond Coated HSS Twist Drill Bits

4pcs Set of Metric 1 mm diameter Diamond Coated HSS Twist Drills Bits

4 pcs Set of 1 mm diamond coated HSS twist drill bits.

Shank diameter: 1 mm                

Diamond Coating length: 10mm.

Overall lenght: 30mm

Great for glass, marble, tile or rock.

Please use a lot of coolant on drill bit and work area, otherwise the drill bit will burn.