Step Drill Bits HSS 5PCS Titanium Step Drill Bit Set, 50 Sizes (1/8" to 1-3/8") High Speed Steel Unibit Drill Bits Set for Sheet Metal with Aluminum Case, Multiple Hole Stepped Up Bits for DIY Lovers - Cortool, 13000006-13000005

• ✅ Two-fluted design provides faster,smoother cutting,provided with small pressure and the sets. ✅ The 3-flat shank titanium drill uses a doubleedged design to make cutting smoother and smoother.Increases cutting speed with self-centering and prevents walking. ✅ Perfect for home repairs and light jobs such as drilling holes in plastic, aluminum, copper, iron sheet and many other types of sheet metal (excluding steel or any other harder metal). ✅ Classic High Speed Steel With Titanium Coating For Proven Capability and Durability. Increases Cutting Speed With Self-Centering And Prevents Walking. ✅ Your customer satisfaction and 30-day warranty of step drill bit can be guaranteed.