The ExoDrive Pass-Through Ratchet and Socket Set offers a low profile handle for working in tight spaces and an insert-snap for securing sockets in useThis design allows you to secure and remove fasteners without the worry of "bottoming out" the socketThe spline design works on various fasteners: 6-point SAE and metric, 12-point SAE and metric, 30% rounded, E-Torx, and squareThe set includes 2 quick release socket adapters to convert the insert-snap ratchet to a regular ratchet for the use of regular socketsSet includes: 1/4" & 3/8" drive 72-Tooth ratchets, (11) 1/4" drive pass-through spline sockets, (11) 3/8" drive pass-through spline sockets, (2) quick release adapters, (2) socket adapters, (1) 1/4-Inch bit adapter, (2) extension bars, (10) 1/4" x 1" screwdriver bits, (1) durable storage case. Socket range is 3/16" (4.5mm) - 3/4" (19mm).