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VUQLDHAYZ
Drill Bits31mm-41mm Shank Twist Drill Bit 1PcsThe taper corresponding relationship:1: the big end diameter phi 12.065, taper: 1:20.0472: the big end diameter phi 17.78, taper: 1:20.0203: the big end diameter phi 23.825, taper: 1:19.9224: the big end diameter phi 31.267 taper: 1:19.2545: the big end diameter phi 44.399 taper: 1:19.002