This 20 piece set includes 17 professional standard metric 1/2" Bi Hexagon sockets supplied in a 'Detection Box' for secure storage. Facom's innovative Detection Box design is perforated to allow for quick appraisal of the box's contents when still closed, making for easy selection of the correct socket. Also supplied is a drive extension & a 1/2" Facom Pear Head Ratchet. The ratchet features a comfortable soft grip handle, & a recessed directional switch to prevent accidental directional selection. A dust proof mechanism safeguards against damage from dust ingress, & moves in 5° increments for precise torque application. Each of the sockets is manufactured from premium grade metal, with a polished finish for additional resistance to chemicals & solvents.Includes:• 17 1/2" Square drive bi hexagon sockets in the following sizes: 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 24, 26, 30 & 32 mm• 1/2" Pear head ratchet• 1/2" Extension bar 130mm• 1/2" Sliding T-Handle • Facom detection box