Product Description:Size: 1pcs/2pcs*6/7/8/9/10mm*250mm (optional) Made of high-quality materials, The drill bit in the package is longer and deeper than the standard drill bit. drills are made of high-speed steel, which are , have high wear resistance and have a long service life. Double-edged drills and round shanks: With a double-edged chip removal design, these drills can speed up the drilling and chip removal process. And the round shank is suitable for most types of electric hand drills and impact drills. Exquisite workmanship: the drill bit is quenched and formed, and the hole diameter meets the industrial tolerance standard. Each drill bit meets industrial performance and safety standards. Wide application range: suitable for various materials, such as die steel, spring steel, white steel, ordinary steel, aluminum, copper, wood, stainless steel (within 1-4mm), plastic and PVC, etc. Product parameters:Length of each drill bit: 250mmMaterial: high speed steelQuantity: 1pcs or 2pcsDrill diameter: 6mm, 7mm, 8mm, 9mm, 10mmPlease add water during the drilling process to prevent the drill bit from breaking. Please take protective measures during use to avoid accidentspacking list:1/2 *6/7/8/9/10mm*250mm drill bit set notes:1. Due to various factors such as display brightness and light brightness, the actual color of the product may be slightly different from the website picture.2. Please allow a slight deviation between the data and the manual measurement.