Hardened and heat treated Chrome Vanadium steel with a fully polished micro satin finish. Colour-coded for fast identification. Knurled rings assist the gripping of the sockets with oily fingers. Supplied with composite socket rail. Contents: 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19mm. LIFETIME GUARANTEE FROM A REPUTABLE UK COMPANY – Founded in 1978, Sealey is a large family run business with a vast product range. Trusted by professionals, all Sealey products are thoroughly tested and backed by unrivalled aftersales service.