Secondary straight-shank step drill step drill bit screw countersunk drill bit secondary drill sub-bit countersunk drill M3-12

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Color classification:: (black) M3 (3.4-6.5)90 degrees (black)M3(3.4-6.5)180 degrees (black)M4(4.5-8.0)90 degrees (black)M4(4.5-8.0)180 degrees (black)M5(5.5-9.5)90 degrees (black)M5(5.5-9.5)180 degrees (black)M6(6.6-11.0)90 degrees (black)M6(6.6-11.0)180 degrees (black)M8(9-14.0)90 degrees (black )M8(9-14.0)180 degrees (black)M10(11-17.5)90 degrees (black)M10(11-17.5)180 degrees (black)M12(14-20)90 degrees (black)M12(14-20)180 degrees Door lock step drill 4*8*117mm Door lock step drill 5*9*125mm Door lock step drill 6*10*133mm Door lock step drill 8*12*150mm (gold)M3(3.4-6.5)90 degree ( Gold) M3 (3.4-6.5) 180 degrees (gold) M4 (4.5-8.0) 90 degrees (gold) M4 (4.5-8.0) 180 degrees (gold) M5 (5.5-9.5) 90 degrees (gold) M5 (5.5-9.5) 180 degrees (gold) M6 (6.6-11.0) 90 degrees (gold) M6 (6.6-11.0) 180 degrees (gold) M8 (9-14.0) 90 degrees (gold) M8 (9-14.0) 180 degrees (Gold) M10 (11-17.5) 90 degrees (gold) M10 (11-17.5) 180 degrees (gold) M12 (14-20) 90 degrees (gold) M12 (14-20) 180 degrees