Material: Made of quality HSS steel and coated with Titanium, to reduce friction and heat. The centering punch is made of impact-resistant alloy steel and its service life is increased tenfold. Convenient for positioning before drilling and breaking glass to escape. Titanium coating allows for effortless cutting of steel sheets, aluminum sheets, copper panels, plastics and Of wood. It can automatically deburr holes to keep the drill clean. 47 Sizes in 5: Bitset contains five standard drill bits that can replace 47 individual drill bits. Centering 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 bit hole cutter, made of high quality HSS steel, titanium coated to reduce friction and heat. Perfect for drilling holes in a variety of materials, including steel, brass, wood, plastic, etc. The valve stem with three sides prevents the bit from slipping; The blade features