Features 1、Made of ti-coated high-speed steel, these hex shank step drill sets have high hardness. 2、The ti step drill bit sets adopts groove design, help the electric drill clamp it more firmly, prevent sliding or falling off during rotation. 3、It is very suitable for using to cut holes in a variety of materials including steel, brass, wood, plastic, etc. 4、Clears chips faster and allows particles to escape easily. 5、Using high‑quality materials, strong and durable, has a long service life. Specification Features: Size: 4-32mm This is the New HSS Steel Large Step Cone Drill Titanium Bit Set Hole Cutter, which is made from high quality HSS steel, and with the Titanium coated to reduce friction and heat It is very suitable for using to cut holes in a variety of materials including steel, brass, wood, plastic, etc Material: 4241 HSS Steel Finish: Titanium Length: Approx. 10.3cm/ 4.06" 4-32mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm) Package Included: 1 x HSS Steel Drill Bit Package List