Ratchet Adapters are the latest Stanley Proto tools designed to add more versatility to the technician's toolbox. When plugged into the head of a ratcheting box wrench, these accessories convert the wrench into an ultra-thin ratchet head that will accept the same sockets and attachments as a standard ratchet. The new line includes adapters that are made to fit into 3/8 in, 1/2 in, and 3/4 in., 10mm, 13mm, and 19mm ratcheting wrenches. It also includes 1/4 in., 3/8 in. and1/2 in. drive versions.