Multifunctional Use: drilling + reaming + deburring, one multi-purpose, cost-effective, stepped structure, 1 twist drill bit worth 15 different High-Quality Material: Made from high quality steel, high-speed steel. With the Titanium coated to reduce friction and heat, ensuring durability and . Versatile Set: This 7-piece set includes step drills ranging from 4-12mm to 4-32mm, as well as saw drills in 3mm, 6mm, and 8mm sizes and 1pcs center drill. Suitable for using to cut holes in a of materials including steel, brass, wood, plastic, etc. Innovative Design: Steel Large Step Cone Drill Titanium Bit Set Hole Cutter. Two flute design provides faster, smoother and cleaner cuts. Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:As Shown Material:steel Package Contents: 7 * Step Drill Groove Saw Drill Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.