Snap-on Tools USA 84 PIECE. 3/8 Drive Metric and SAE 6 Point. Shallow, Semi Deep, and Deep MASTER SETS. Master SAE socket s. 211FSSY semi deep set. This master set also includes all of the 15/16″ and 1″ sizes. FS121 = 3/8″ FS141 = 7/16″. FS161 = 1/2″ FS181 = 9/16″ FS201 = 5/8. FSS121 = 3/8″ FSS141 = 7/16″. FSS161 = 1/2″ FSS181 = 9/16″ FSS201 = 5/8. SFS121 = 3/8″ SFS141 = 7/16″. SFS161 = 1/2″ SFS181 = 9/16″ SFS201 = 5/8. Master METRIC socket set includes. 212FSMSY semi deep set. This master set also includes all of the 6MM, 7MM, and 20MM sizes.