Especially in the smaller sizes, these are longer than most standard-pattern wrenches for extended reach in tight spaces and more torque-multiplying leverage.
Reducing the working swing arc in tight spaces, the open end is angled 15 degrees so the wrenches can be flipped over with each rotation to engage the fastener twice as often.
A 12-point box end doubles the access angles of a 6-point and prevents round-off by gripping the flat sides of fastener heads rather than the corners. The 15-degree offset creates clearance for your fingers.
The premium roll-up pouch has a tailored cover that keeps wrenches from sliding out. To prevent scratches on finished surfaces, it has fabric hanging loops rather than metal grommets.