Cut and renew internal and external metric threads to exact standards. For basic profession and household projects. Made of high quality steel, this set is perfect for 6-32, 10-24, 1/4-20, and 5/16-18 threads and includes 10 pieces. With a comfortable grip and easy to use design, this set is perfect for any level of user. Get your projects done quickly and easily with the Steel Grip Steel SAE Tap and Die Set!