... /2"), 20mm(3/4"), 25.4mm(1") series manual sleeve wrenches, (1/2") sleeve wrenches with9 pieces, 10 pieces, 13 pieces, 17 ... , 28 pieces, and32 pieces, 20mm series, (3/4") series sleeve wrenches with 9 pieces, 15 pieces, 21 pieces, and 26 pieces, 27 ... pieces in metric system andBritain system, 25.4mm (1") series sleeve ...