Snap-on Tools USA NEW ORANGE 83-Piece 1/4 Drive 12-POINT Metric & SAE Shallow /Semi-Deep / Deep Master Socket Set In Trays w/Orange Hard-Grip Ratchets. THLD72 = 1/4 Fixed-Head Ratchet. THLFD72 = 1/4 Flex-Head Ratchet. KA143FROR = SAE. KA143METOR = Metric. TMMD4.5 = 4.5mm. TMMDS4.5 = 4.5mm. STMMD4.5 = 4.5mm.