HSS Titanium Step Drill Bits with Automotive Center Punch, 50 Sizes High Speed Steel Bit Set for Sheet Metal Aluminum Case (5PCS + 1PC Punch)

➤➤【High Quality Material】-- This step drill set made of High speed steel along with titanium coating ensures outstanding durability and sharpness,can reduces the friction,runs cooler. ➤➤【Automatic Center Punch】-- The center punch delivers an automatic,high-impact,spring-loaded strike through adjusting the cap; its brass body has a deeply knurled surface for nonslip control. ➤➤【Product Feature】-- Step drills are indicated in sizes. These sizes determine the diameters and the number of steps. Assortment comes with 5 drill bits of a combined 50-step sizes added：6-step drill（3/16" to 1/2"），9-step drill（1/4" to 3/4"），10-step drill（1/4" to 1-3/8"），12-step drill（3/16" to 7/8"），13-step drill（1/8" to 1/2"） ➤➤【Application:】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 ➤➤【What you get:】Includes five standard step drill bits with center punch,which can replace 50 individual drill bits, you can process 50 different kinds of diameter holes with the five pieces.