Large Cobalt Step Drill Design Service Life Step Drill Bit High Hardness For Cuting Holes

Large Cobalt Step Drill Design Service Life Step Drill Bit High Hardness for Cuting Holes Specification: Features: - This Item ia - This set replaces 50 individual drill bits. Two-flute layout gives you faster smoother cutting. 3-sided -FLAT shank will not slip in your drill s chuck. Cobalt coated for smoother cooler cutting - Ti coated to reduce friction and run cooler - Large bit has 3-sided shank and small bits have hex shank to prevent slip in drill chuck - Automatically deburrs holes as you drill - Life high speed steel - Includes protective padded aluminum case - Package Size:15cmx10.5cmx4.2cmLxWxH Sizes: #1: 3/16 to 1/2 6 Steps 3/16 1/4 5/16 3/8 7/16 1/2 #2: 1/8 to 1/2 13 Steps 1/8 5/32 3/16 7/32 1/4 9/32 5/16 11/32 3/8 13/32 7/16 15/32 1/2 #3: 1/4 to 3/4 9 Steps 1/4 5/16 3/8 7/16 1/2 9/16 5/8 11/16 3/4 #4: 1/4 to 1-3/8 10 Steps 1/4 3/8 1/2 5/8 3/4 7/8 1 1-1/8 1-1/4 1-3/8 #5: 3/16 to 7/8 12 Steps 1/4 5/16 3/8 7/16 1/2 9/16 5/8 11/16 3/4 13/16 7/8 Package included: 1 x 1/4-1-3/8 Step Drill 1 x 3/16-7/8 Step Drill 1 x 1/4-3/4 Step Drill 1 x 1/8-1/2 Step Drill 1 x 3/16-1/2 Step Drill 1 x Aluminum Box