18 mm Ratcheting Combination Wrench

6-point box end snugly fits hex-shaped fastener heads and resists slipping off while you work
Box end opening is designed to grip flat sides of fastener heads, not corners, to prevent round-off
72-tooth ratchet gear needs only a 5-degree working swing arc
Open end is angled 15 degrees so the wrench can be flipped over to engage fasteners twice as often in tight spaces