Features and Benefits:Socket system features the Pass-Thru? drive system that links drive tools and sockets;Pass-Thru? socket system eliminates the need for deep sockets;Reach fasteners in tight spaces with ease;Hard stamped size markings;The Pass-Thru? socket and GearRatchet? ratchet system by GEARWRENCH was designed to improve productivity and access on every job. The GearRatchet? ratchets need as little as 5? to move fasteners vs. 30? for standard wrenches and are 40% stronger than standard ratchets by eliminating the drive tang. The ratchets are up to 50% thinner than standard ratchets providing superior access to even the most hard-to-reach fasteners.