3 Pcs step drill bit set
1pcs 4-12mm，2mm/step, Shank diameter：6mm
1pcs 4-20mm，2mm/step, Shank diameter：8mm
1pcs 4-32mm，2mm/step, Shank diameter：10mm
Material: HSS
Applies to Steel Plate thickness≤3mm
Packed by double blister
