3pcs Titanium Coated Step Drill Bit Quick Change 1/4 Inch Hex Shank

Description 3pcs Titanium Coated Step Drill Bit Set Quick change 1 4 Inch Hex ShankSpecification Shank 6mm dia 25mm L 1 4 Material High speed steel 4241Allow 1 3mm measurement error 3 16 1 2 6 steps 3 16 4 76mm 1 4 6 35mm 5 16 7 94mm 3 8 10 35mm 7 16 11 11mm 1 2 12 7mm 1 4 3 4 9 steps 1 4 6 35mm 5 16 7 94mm 3 8 10 35mm 7 16 11 11mm 1 2 12 7mm 9 16 14 28mm 5 8 15 88mm 11 16 17 46mm 3 4 19 05mm 1 8 1 2 13steps 1 8 3 18mm 5 32 3 97mm 3 16 4 76mm 7 32 5 56mm 1 4 6 35mm 9 32 7 14mm 5 16 7 94mm 11 32 8 73mm 3 8 9 53mm 13 32 10 32mm 7 16 11 11mm 15 32 11 91mm 1 2 12 7m Features 1 The ladder of its unique structure a bit can open a variety of specifications of aperture 2 Do not need to use center punch compared with twist drill is not easy to be broken 3 Deburring chamfering elliptic hole enlargement twist drill the function of them was unable but it is possible 4 The use of tools drill bench drill Work while water cooling can effectively extend the service life of drill bit recommend drilling rate of 250 250 RPM Package included 1x Set 3pcs Hex Titanium Step Drill