OWSOO 50 Sizes HSS Step Drill Bit Set with Automatic Center Punch and Aluminum Case Multiple Hole Titanium Straight Grooved Step Drill for Metal Wood Sheet (5pcs)

Features: 50 Sizes Step Drill Bits -- The HSS step drill bit set includes 5pcs standard step drill bits which can process 50 sizes hole 14in and 38in shank sizes compatibility with all major press drills and drills. Durable Titanium Coated Bits -- High speed steel straight grooved drill bit along with titanium coating ensures outstanding durability and sharpness cut more smoothly can reduces the friction runs cooler hence lengthening the service life. Automatic Center Punch -- Solid brass construnction center punch help you mark the center point that you want to drill knurled non-skid handle improved grip with replaceable lid for extra stength. Wide Application -- The sharp drill bits can easily drill perfect holes in the aluminum copper steel metal sheets and and wood board. Alluminum Case for Easy Store -- Come with an exquisite aluminum case protects the drill bits not easy to dull and prolongs the drills lifespan. Specification: Material: High-Speed Steel + Titanium Coating Color: Blue + Step Size: 38in shank: 14in - 1-38in 38in shank: 316in - 78in 38in shank: 14in - 34in 14in shank: 18in - 12in 14in shank: 316in - 12in Shank Length: 25mm1in Center Punch Length: 130mm5.1in Case Size: 150*140*40mm5.9*5.5*1.6in Packing List: 5 * Step Drill Bits 1 * Automatic Center Punch