It works with ropes from 11mm to 13mm in diameter (approximately 7/16" to 1/2")

Is this carabiner safe to use as a chainsaw tether

16oz / 12oz

48" length stretches to a full arm's reach

and hardware

VELOX HAAS KNEE ASCENDER titanium It works with ropes fromThe New Velox makes the original HAAS even better. With an additional 18 inches of bungee in the system, the Velox is a one size fits all, zero set up, efficient rope access tool. Now the snap is tied just above the ascender and will extract out 30 inches, which eliminates any set up, as well as any dead spots in the return action. Still made by the guys at Haas tree gear in Ohio.