Feature: * Large drill bits with smaller shanks for use in standard drill chucks. *Punching is easy and durable, sharp and wear-resistant, can be used with extension cords (not included). * Can be used for various wood drilling, suitable for solid wood boards, composite boards, wood products, plastics, PVC pipes and so on. * Comes with 1/2'' (12.5mm) adapter, compatible with electric wrench, lithium battery wrench, etc. Be sure to use it after installation, pay attention to safety. Specifications: Product name: drill bit Material: HSS Color: gold, black Shank: 14mm Length: (approx.) 125mm Optional size: 14mm, 16mm, 18mm, 20mm, 22mm, 25mm Suitable for: solid wood boards, composite boards, wooden products, plastics, PVC pipes and so on. Quantity: 2pcs set Package includes: 1 times; drill 1 times; 1/2" Key Adapter Note: 1. Passage: 1cm = 10mm = 0.39 inch. 2. The real color of the item may vary slightly from the website images caused by many factors such as brightness of your monitor and light brightness .3.Please allow slight manual measurement deviation for the data.