9.2mm Titanium Coated M42 High Speed Steel 8% Cobalt (HSS) Twist Drill Bit 6mmx1/4PT and other models

and other models

Material - Made of PP Plastic Material

good effect

Chain Length: 1M / 3

the  support are integrally formed

9.2mm Titanium Coated M42 High Speed Steel 8% Cobalt (HSS) Twist Drill Bit 6mmx1/4PT and other modelsM42 steel is a super hard cobalt high speed tool steel containing 8% cobalt, with good toughness, high wear resistance, high cutting efficiency, and good hot hardness (Retains hardness even at high temperatures of the cutting edge.). Nanoscale gold titanium coating can apply lubricant better for smoother drilling and is more durable and corrosion resistant. Can greatly improves hardness, wear resistance, and reduces the coefficient of friction. Sharp