Hex Bits 3Pcs Black HSS Step Drill Bit Set for 3-12mm/4-12mm/4-20mm Drill Bit Set Hex Quick Change Power Tools

Specification: 4-20 (9th order): 4mm 6mm 8mm 10mm 12mm 14mm 16mm 18mm 20mm 3-12 (Tier 10): 3mm 4mm 5mm 6mm 7mm 8mm 9mm 10mm 11mm 12mm 4-12 (5th order): 4mm 6mm 8mm 10mm 12mm Colour:black Material:high speed steel Package Contents: 1 * 4-20mm (9 step) drill bit 1 * 3-12mm (10 step) drill bit 1 * 4-12mm (5 step) drill bit 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.