SNAP ON TOOLS OEX28B 7/8", // SAE /// 12 POINT STANDARD LENGTH OPEN /BOX END WRENCH. OEX28B 7/8"NEWER SNAP ON LOGO 12.1/2" LENGTH. The SNAP ON OEX28B 7/8" 12 POINT SAE COMBINATION WRENCH is a high-quality hand tool designed for automotive use.