The Professional Hand Ascender from ISC is designed for industrial use. The cam does not have spiked teeth that pick at the rope sheath. This also helps it release when pushed up against a knot or pulley.
The very nice ergonomic design makes this comfortable to use. No rope running over the back of your hand when pushing it along the rope.
Machined from a single piece of aluminium, these are hard-working and hard-wearing.
