Ko-ken Tools 1/4 Sq. Dr. 21 Piece SAE 12-Point Socket Set 7/32-9/16SAE, Square Drive, 12 Point, Standard Length, Chrome Hand Sockets. 12 point (double hexagonal) configurations: 12 point sockets can be used on square nuts and fasteners, and also offer double the amount of starting points. The design is normally only used for general purpose applications because it can greatly increase the chance of rounding or slipping off a nut or fastener. 12 points are preferred however because that are faster and more versatile