Features: - [High-quality material]: The titanium alloy coating is made of high-quality steel, which can reduce friction and heat, making it easier for you to use. use. - [Unique design]: The groove design can provide faster, smoother and cleaner cutting effect. - [Widely used]: This drill bit is very suitable for all types of soft metals, plastics, fiberglass, wood, so you can use it anytime and anywhere. - [Trilateral handle]: the trilateral handle can prevent the drill bit from sliding into the tray. Features: Product name: step drill bit. Material: Steel Quick 4241 (HSS) Finish: Titanium Shank: 1/4 inch or 3/8 inch Size Step drill bit to 6 packs: 3/16-1/2 inch (3/16, 1/4, 5/16, 3/8, 7/16, 1/2) Working material: - Suitable for carbon steel sheets, iron sheets, steel sheets, insulation boards, wood. - Do not cannot be used for stainless steel. - Suitable for room at 25 or lower Note: 1. Please allow a little error due to manual measurement. Please make sure you do not mind before bidding. 2. The color may be different as the difference display, please understand. Package included: 1 x 6 Setps Step Drill Bit p>Sold by the grid cool store