Material: Made of quality HSS steel and coated with Titanium, to reduce friction and heat. The center punch is made of shock-resistant alloy steel and its service life is increased tenfold. Convenient for positioning before drilling and breaking glass to escape. Titanium coating allows effortless cutting of steel sheets, aluminum sheets, copper panels, plastic and wood. It can automatically deburr holes to keep the drill clean. 47 Sizes in 5: The bitset contains five standard drill bits that can replace 47 individual drill bits. The center punch provides automatic, powerful, spring-loaded impact by adjusting the cap. 1/4 HEX quick release handle for easier tightening. This is the new HSS Steel Titanium Core Drill Bit Hole Cutter, made of high quality HSS steel, coated with Titanium to reduce friction and heat. Perfect for drilling holes in various materials, including steel, brass, wood, plastic, etc. Three-sided valve stem prevents the drill bit from slipping; The blade features a