Features and Benefits:90-tooth ratcheting box end delivers a 4° swing arc to turn a fastener in tight spaces;Flexible head provides access to hard-to-reach bolts and fasteners;Off-corner loading design on box end provides better grip and reduces fastener rounding;Dual-direction off-corner loading on open-end reduces fastener rounding;12-point ratcheting box-end for use on 6 or 12-point fasteners