The Sidchrome 35 Piece 1/2" Square Drive Socket & Spanner Set features both metric and A/F imperial sockets, housed in a metal case with a 1/2" spinner drive, 1/2" ratchet handle and a 125mm extension. the set also includes 6 Imperial ROE Spanner 3/8, 7/16, 1/2, 9/16, 5/8 and 3/4" and 8 Metric ROE Spanners 8, 10, 12, 13, 14, 15, 16, 17mm.