Features: 1) Standard: a) 3-6, 6-8, 8-11, 11-14, 14-18, 18-20mm b) 1/8"-1/4", 1/4"-5/16", 5/16"-7/16" Packing: 72 sets/ctn Carton dimensions: 38 x 27 x 28cm N.W.: 12kg G.W.: 14kg