MCS-550105 - Metric sizes. Incl. 4 hex keys (3; 4; 5; and 6mm); 2 screwdrivers; a socket driver with 8; 10; and 12mm sockets; 13 and 14mm open-end wrenches and 3 spoke wrenches. Except for the sockets all pieces are permanently attached. 3.5" (8.9cm) long; weight 10 o