Snap-on Tools USA NEW 17-Piece 0° Offset Non-Reversing Ratcheting Wrench Foam Set. Set Model #’s. – SOXRM22A = 22mm. – SOXRM21A = 21mm. – SOXRM19A = 19mm. – SOXRM18A = 18mm. – SOXRM17A = 17mm. – SOXRM16A = 16mm.