Size of Sockets: 70520 Socket#1, 70540 Socket#2, 70560 Socket#3, 70580 Socket#4, 70600 Socket#5, 70620 Socket#6, 70640 Socket#7, 70660 Socket#8, and a storage holder. With the variety of sizes in this set you could handle different tap sizes 8PCS Tap Socket Set: These sockets allow users to tap threads in tight or hard-to-reach areas and ideal for use in areas where a T handle 't fit. The tap sockets fit securely and makes tapping and threading tasks more easier, improving work efficiency Improve Efficiency: This Tap Sockets are fantastic tools to simplify tapping new threads to fix stripped and damaged bolt threads. Simply attach the socket to a 1/4" or 3/8" square drive tool, insert the tap, and use the power of a ratche wrench, T-handle, or extension bar to complete threading in seconds Tap Socket Adapter: Made of premium carbon steel and coated with a black oxide protective layer for durability and reliability. size markings for quick identification and selection. The included storage holder neatly stores the sockets and socket sets easy to carry Widely Used: This 70500 tap socket set is designed to compatible with all M.C.T.I. standard taps up to 1/2", including 1/8" NPT taps and metric taps up to 12mm. Perfect for tap and die sets, thread tap sets, and metric tap and die sets, covering a wide range of threading tasks, Manufacturer: Akfldms