Mesee 3 Pcs Step Drill Bit Set, High-Speed HSS Steel Step Cone Drill Bits 1/4 Inch Hex Shank Step Drill Titanium Coated Hole Drilling Cutter Tool for Wood Plastic Sheet Metal

?Specification: Material: High-speed steel Finish: Titanium Colour: Golden Size of Step Drill Bits 6-Step from 3/16" to 1/2"  9-Step from 1/4" to 3/4"  13-Step from 1/8" - 1/2"  ?Feature: Hard & Durable Industry grade High-speed steel with titanium coating can reduce friction and run cooler, which ensures prolonged wear-resistance and durability.  Precise Performance Split Point provides fast cutting with Quick Change Hex Shank provides fast and precise cutting while prevents walking and shedding; Laser calibration offers accurate positioning assistance. Wide 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. ?Kindly Note: ? When using the drills, for safety, please always wear protective goggles, masks and gloves. ? Don't touch the bits with your hand as the drill will produce heat during operation. ? Please notice that the product needs to be cooled by water injection when using as the step drills will easy to become soft under high temperature. If don't cool the drill, it will be scrapped soon. ? Bcs this material of step drill bits made of HSS High-speed steel 4241, we suggest that you'd better don't drill the products which hardness is the same as or higher than our ones.  ?Package Included: 3 x Step Drill Bit Set