The VIM Tools 10-pc Dual Drive Nano UJ Metric Socket Set - 1/4" x 11mm Drive, No. DDSUJM400, is designed to have a low profile when used with an 11mm wrench. The VIM dual-drive system allows users to take advantage of the low profile while retaining the full flex of a regular-length universal socket. When clearance isn't an issue, technicians can use the normal 1\4" square drive. The spring-loaded feature prevents the universal joint from coming loose, eliminating the need for O-rings or tape. The socket set comes organized on a VIM Tools magnetic rail.