A perfect addition to any tool box, this 10-piece SAE Hex Key Set is made of high alloy steel for long life, strength and durability. Each hex key is held on a key-ring type holder. They come in 10 different sizes: 1/16", 5/64", 3/32", 1/8", 5/32", 3/16", 7/32", 1/4", 5/16", 3/8". Comes packaged in a blister pack.