Snap-on Tools USA VERY RARE 1970’s 13-Piece 1/4″ & 3/8″ Mixed-Drive 6-POINT & 12-POINT BRITISH STANDARD / WHITWORTH Shallow Chrome Socket Set w/ Original Snap-on Branded Socket Storage Rail. Very nice, gently used conditions. Barely used, if at all. WTM96A = 3/16 BS. WTM99 = 1/4 BS. WTM100 = 5/16 BS. WF-96A = 3/16 BS. WF-99 = 1/4 BS. WF-100 = 5/16 BS. WF-101 = 3/8 BS. WF-102 = 7/16 BS. WF-103 = 1/2 BS. WF-104 = 9/16 BS.