thats what i though too....Haul yourself up the mast unassisted device??
but the zrt progrip is just a ratchet strap tie down device. not to be used for climbing..
and the harken bits match up to this
Designed for one-person operation. Raise and lower with a single control rope. Patented design lifts and lowers loads evenly, regardless of weight distribution. Self-locking safety cleat grips instantly if the rope is accidentally released. Stainless steel hardware, double-braid rope for...