9milelake Heavy Duty Tensioner & Cutter for Polyproplyn and Polyester and Cord Strapping , Strap Size: 3/8"- 3/4" heavy duty tensioner & cutter for polyproplyn and polyester and cord strapping for use on round or for polyproplyn and polyester and cord strapping for use on round or flat surfaces strap size range: 3/8---3/4