GearWrench mechanics tools have been designed with the professional user in mind for better productivity, access and strength. GWXSCBMTS12 is a 27-piece 1/2 in drive mechanics tool set that features 12-point sockets in SAE and metric standard length. Also included in the set are one quick-release 1/2 in drive ratchet, one extension, one magnetic bit holding screwdriver and four frequently used bits. Set comes with socket rail and bits holder for storage and organization.