Features ANTISLIP™ fastening system: a locking groove on the open end to prevent slippage and protect your knuckles from injury Chrome vanadium construction: made from the highest quality alloys for long-term durability Complete set with 9 sizes: the right size for any job, every time Durable, organised wallet: to keep your spanners organised, so you can grab what you need and get back to work Specifications Sizes: 1/4 x 5/16, 3/8 x 7/16, 7/16 x 1/2, 1/2 x 9/16, 5/8 x 11/16, 11/16 x 3/4, 13/16 x 7/8, 15/16 x 1”, 1-1/8 x 1-1/4” Materials: chrome vanadium