*Material:Carbon Steel
*Hardness:>HRC 50°
*Type of Shank:Smooth, Straight Grooved, Spiral, Angular Spiral
*Type of Point:Diamond Point, Needle Point
*Type of Head:No Head
*Surface Treatment:Galvanized, Colored Zinc *Plating, Black, Bluing, Copperized
*Shank Diameter:1.60mm--4.57mm
*Overall Length:20mm--100mm