Socket organizer, holds 28 standard or deep 1/2"D sockets, featuring a twist & lock function to keep the sockets in place. For socket sizes: 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22 & 23mm. Overall dimensions: 481 x 101 x 25.5mm. Manufactured from Polypropylene (PP) & Thermoplastic rubber (TPR). Other sizes also available; 1/4"D (Part No. 8632), 3/8"D (Part No. 8633).