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SELAMAT DATANG Feature: 1. The laser engraving precision on each drill bit is very suitable for drilling large and small holes in metal and plastic. 2. The straight groove step drill facilitates the removal of cutting debris when drilling, prevents iron chips or sawdust from flying, and ensures that the drilling is beautiful and accurate. 3. The auger cutting is smoother than the straight drill, the drill bit is sharp, and the perfect hole can be easily drilled in the metal plate. 4. With the step bits we offer, you can process different kinds of diameter holes, saving you a lot of trouble. 5. Ideal for metal/wood/plastic countersunk, suitable for DIY at home, and general constructio/engineering use. Specification: Item Type: Drill Material: High Speed Steel4241 Product Specifications: 3-12mm/0.1-0.4in, 4-12/0.15-0.4in, 4-20/0.15in-0.7in, 4-32mm/0.15in-1.25in Processing Range: It Can Open and Ream the Iron and Aluminum Plates with a Thickness of Less Than 2mm/0.07in. Both Hand Drills and Bench Drills Can Be Used Package List: 4 x Step Drill1 x Cloth Bag Note: Please install the correct size step drill according to your requirements