3 PCS HSS Metric Spiral Steel Grooved Step Cone Drill Bit Set Hole Tool 4mm 12mm 20mm 32mm Cut

Description

Dimension #1: 4mm to 12mm 9 Steps (4mm,5mm,6mm,7mm,8mm,9mm,10mm,11mm,12mm),6.5cm(L) #2: 4mm to 20mm 9 Steps (4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm),7.7cm(L) #3: 4mm to 32mm 15 Steps (4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm,22mm,24mm,26mm,28mm,30mm,32mm),10cm(L) Package: 3pcs step drill bit set