3Pcs HSS Cobalt Step Drills Bit 4-32MM High Speed Steel Nitrogen Spiral Triangle

Model 3pcs Cobalt Step Drill Bits. Material : High Speed Steel(HSS). Shank:Triangle round handle. Large bit has 3 sided shank. 4-32mm(4,6,8,10,12,14,16,18,20,22,24,26,28,30,32mm),Shank:25 x 10mm. 4-20mm(4,6,8,10,12,14,16,18,20mm),Shank:20 x 8mm.

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