Connecting hardware conforms to ASTM F887, ANSI Z359.12 and CSA Z259.12, Class I requirements. Abrasion resistant inner strap material for durability-includes a red wear indicator. Outer strap constructed of klein-kord material-a proven material for years with linemen. Wood pole diameter range from 8 inch to 16 inch. Cam bracket system for easy adjustments. Vinyl storage bag includes a zippered pocket for instruction manual and DVD. The wood pole fall restrict device has been designed to meet CSA Z259.14-01 standard as a type a fall restrict device. Do not use on icy poles. Also meets or exceeds ANSI Z359.3, ASTM F887, OSHA 1910, 1926.