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, it is best to add oil before using it. ——When working with a step drill bit, you need to add water to keep the temperature down.