Description Center hole (semi-square with round corners) enables roll to be quickly reversed for right or left hand use. Roll slips quickly onto the reel, yet easily rewinds. Continuous rolls and uniform diameters. Ideal to tie rods. Meets ASTM-A-853. 16.5 gauge. 3.5 pound coil. WARNING: This product can expose you to chemicals including Lead which is known to the State of California to cause cancer, birth defects or reproductive harm and Butyl Benzyl phthalate (BBP) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov