The Boa Constrictor Strap Wrench is the original and best strap wrench. Useful for many jobs including plumbing, automotive, A/C installation/maintenance, pool, pond and oil filters. Both strength and flexibility are provided by the braided rubber strap, which fits into a slot in the handle of the tool and provides a perfect fit on the work piece. Provides over 2,000lb of pressure without marking the workpiece with a pro use capacity of up to 160mm. Capacity: 10mm (3/8in) to 160mm (6.1/4in)