90-teeth deliver a 4 degree swing arc for improved access. Dual-direction off-corner loading on open-end reduces fastener rounding. Longer, more ergonomic beam than traditional ratcheting wrenches. Large color-coded markings for easy size ID. Off-corner loading design to reduce fastener rounding. Sizes 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 24, 25mm.