Gradual Sheet Drilling Attachment Attached to 3 Piece Step Drill Bit Set
3 Piece Gradual Step Drill Bit Set, 3 Piece Gradual Bits made of high-speed steel.
Cut without cracking with double flute system. 1st Bit: 4, 6, 8, 10, 12 mm 2nd Bit: 4, 6, 8, 10, 12, 14, 16, 18, 20 mm 3rd Bit: 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32 mm Tin coating 6 times more durable than normal HSS bits.
Package Content
3 pieces of 3-step sheet drilling attachment