Snap On 12-Point SAE Flank Drive® S-Shaped Box Wrench set of 4. Used but In good condition, various surface scratches but nothing major. Sizes and serial numbers. 11/16 x 3/4 SBX2224. 9/16 x 5/8 SBX1820. 7/16 x 1/2 SBX1416. 5/16 x 3/8 SBX1012. Please see my other snap on and blue point items for sale.