XL GearBox design has a longer beam to increase leverage and torque. 0 degree offset and slim profile to access the tightest spaces and recessed fasteners. Longer beam increases leverage to maximize torque at the non-ratcheting box end for breaking loose stubborn fasteners. Surface Drive Plus reduces fastener rounding. Ratcheting box-end needs as little as 5 degrees to move fastener vs 30 degrees for standard box end wrenches. The GearWrench 85988 12-Piece 12-Point Metric XL GearBox Double Box Ratcheting Wrench Set is a must-have to finish all your fastening applications with a box end that allows access into tight areas, including recesses and counter bores. These GearBox Wrenches have a 5 degree ratcheting arc which provides maximum speed and an improved ratcheting mechanism for greater strength.