Features High Quality Material: Made of high quality chrome vanadium steel material with heat treatment, which ensures high hardness and wear resistance. Versatility: Includes 10 different size extractors from 3.2mm to 10.3mm, allowing you to handle various repair jobs. Maximum Grip: The inverted spiral design provides maximum grip and makes it easy to remove broken studs and bolts. Convenient Drill Size: Each puller is engraved with the recommended drill size, making it suitable for high torque applications. COMPACT AND ORGANIZED: The set comes with a red carrying case for easy storage and portability, keeping the extractors organized and close at hand. Descriptions: This screw extractor set is used to remove broken studs and bolts. Made of high quality chrome vanadium steel material and treated by heat treatment, with high hardness and wear resistance. And includes 10pcs different size extractors from 3.2-10.3mm, so you can fulfill your repair work in different circumstances. Specifications: Material: chrome vanadium steel Color gray Quantity: 10 pieces Weight: 537g Size: 1/8"(3.2mm), 5/32"(4mm), 3/16"(4.8mm), 7/32"(5.5mm),1/4"(6.3mm), 9/32"(7mm), 5/16"(8mm), 11/32"(8.7mm), 3/8"(9.5mm), 13/32"(10.3mm) Delivery content: 10 * Screwdrivers 1 x red case Package List