As one of its daily deals, That Daily Deal offers the Mastercraft Boa Constrictor Super Heavy Duty Strap Wrench for free plus $5.49 for shipping. That's the lowest price we could find by $5, although most similar wrenches are $20 or more. It features a 1/2" square drive. This adjustable wrench is designed to not scratch and tighten odd-shaped objects with a maximum diameter of 6-3/8".