Locking flex head handle provides adjustable angles giving greater access. Design allows for 40% more strength than conventional square drive ratchets. Ratchet head is up to 50% slimmer than conventional ratchets. Pass thru ratchet and socket system eliminates the need for deep sockets. Longer length for improved reach and torque Includes 3/8" drive sizes: . 3/8 in., 7/16 in., 1/2 in., 9/16 in., 5/8 in., 11/16 in., 3/4 in., 13/16 in., 7/8 in., 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm and 19MM sockets; 3 in. Hollow Extension, 6 in. Hollow Extension, 3/8 in. Square Dr. Quick-Release Adapter Packaged in a blow molded case