IRONANT Step Drill Bits 5PCS HSS Titanium Step Drill Bit Set 50 Sizes High Speed Steel Step Bits for Metal with Aluminum Case

IRONANT 5 PCs Step Drill Bit Set Specification: #1 Bit（10 steps）: 1/4"" 3/8"" 1/2"" 5/8"" 3/4"" 7/8"" 1"" 1-1/8"" 1-1/4"" 1-3/8"" #2 Bit（12 steps）: 3/16"" 1/4"" 5/16"" 3/8"" 7/16"" 1/2"" 9/16"" 5/8"" 11/16"" 3/4"" 13/16"" 7/8"" #3 Bit（9 steps）: 1/4"" 5/16"" 3/8"" 7/16"" 1/2"" 9/16"" 5/8"" 11/16"" 3/4"" #4 Bit（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"" #5 Bit（6 steps）: 3/16"" 1/4"" 5/16"" 3/8"" 7/16"" 1/2"" Feature: ——118° X-type Split Point - Increases cutting speed with self-centering and prevents walking. ——Two-flute Design - guarantees a faster and smoother cutting allows particles escape easily. ——Tri-flatted shank will not spin inside the chunk compatible with different types of drill machines effectively. ——Application - suitable for sheet metal wood board plastic aluminum alloy copper NOT recommended for high carbon steel hard metal. Warm Tips: ——To extend the service life of the step drill bit and facilitate drilling