5-piece countersink drill bit set, step drill bit, with professional aluminum housing, hexagonal shank, with automatic centering buffer, for precise drilling in steel and metal

Description Material: Made of high-quality HSS steel and coated with titanium to reduce friction and heat.
The center punch is made of impact-resistant alloy steel and its lifespan is ten times longer. Practical for positioning before drilling and for breaking windows to escape.
The titanium coating allows effortless cutting of steel sheets, aluminum sheets, copper plates, plastic, and wood. Holes can be automatically deburred to keep the drill bit clean.
47 Sizes in 5: The bit set contains five standard drill bits that can replace 47 individual drill bits.
The center punch provides an automatic, powerful, spring-loaded impact by adjusting the cap. 1/4" hex quick-release handle for easier tightening. This is the new titanium-coated HSS hole punch 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. The three-sided blade on the valve shank prevents the drill bit from slipping; the blade features a double-edged design for faster and more frequent cutting. Protective packaging: A filler insert is included in the bit box to prevent damage during shipping. Automatic center punch: The center punch provides an automatic, powerful spring-loaded punch through the cap adjustment; its brass body has a heavily knurled surface for non-slip control; and the carbide-tipped point makes the center punch 10 times stronger than normal. The aluminum protective casing dulls the tips considerably.