3Pcs HSS Cobalt Step Drill Bit Set Nitrogen High Speed Steel Spiral for Metal Cone Triangle Hole Metal Drilling

Type: step drill Material: high speed steel colour: black Package Contents: 1 x 4-12mm drill 1 x 4-20mm drill 1 x 4-32mm drill 1 x bag(Note: Random color t accept the specified color.) Only the above package content other products are not included. Note: Light 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.