High speed steel with cobalt twist drill bit Set of 19 High speed steel cobalt drill bits for metal 5% cobalt drill bit set steel drill bits for hard metal diamonds are perfect for stainless steel and hard metals 135% self-sharpening impact drill set Drill point with built-in positioning function that requires no additional positioning Easy penetration of hard metals Long torsion bar with different drilling depth option metric drill bit set 1mm,1.5mm ,2mm, 2.5mm,3mm,3.5mm,4mm,4.5mm,5mm,5.5mm,6mm,6.5mm,7mm,7.5mm,8mm,8.5mm,9mm,9.5mm,10mm A total of 19 round bar drills of different diameters,More large size drills for a range of applications suitable for home manual scenes and professional work metal storage case Easy to carry and store drill bits Box size identification for easy selection and storage Material: metal Color: as shown Package Contents: 19 x High speed steel with cobalt twist drill bit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.