Check the listing for details. 6Pcs Socket Adapter Impact Drill Bits Set 1/4" 3/8" 1/2" Hex Shank Extension Bar. Condition: New. Listed at 9.99 USD. Each adapter made of heat-treated hardened chrome Vanadium(CR-V) steel, good abrasion resistance and high hardness, without breaking or rusting, deliver on long-lasting strength and durability.Spring loaded ball bearing on head, designed to fit securely while providing versatility and convenience no matter which tool you use. Compatible with common to heavy duty power tools, drivers, hand wrench, and screwdriver handle tools for flexible uses.CONTENTS:(1)2-Pieces 1/4" adapter: 65mm &150mm;(2)2-Pieces 3/8" adapter: 65mm &150mm;(3)2-Pieces 1/2" adapter: 70mm &150mmAll socket-drive adapter are 1/4” hex shank, the 1/4" hex shank air impact driver sockets fit all quick change chucks as well as standard drill chucks, fast connect, work on quick change drill chuck, standard drill chuck, handheld screwdriver, electric screwdriver, change your hand socket set into a driver socket set.Ideal for Home Mechanics: Impact socket adapter is suitable for both serious hobbyist mechanics and occasional DIYer, auto parts repairs and household maintenance, machinery, motor vehicle, cars, etc. Spend the least money and take the most effect. You will need one.