GEARWRENCH mechanics tools have been designed with the professional user in mind for better productivity, access, and strength. GW72SCBMTS is a 121 piece 1/4 in., and 3/8 in. drive mechanics tool set that features precision 6 point sockets in SAE and metric sizes and in standard and deep lengths. Also included in the set are 2 quick release ratchets, various drive tools, 6 combination wrenches and frequently used bits. Set is furnished in a blow mold case for storage and organization..