CT Roll-N-Lock Rope Clamp and Pulley

The CT Roll-N-Lock from Climbing Technology puts a toothed rope clamp and a pulley sheave in one compact body. Climbers use it for progress capture, short haul systems, and as a rope grab that runs smoothly when the line is pulled through.

What the Roll-N-Lock does

The Roll-N-Lock pairs a cam with teeth and a small pulley wheel. Rope runs over the wheel one way with low friction, and the cam bites when the rope tries to run back. That makes it a self-contained progress-capture pulley, which is the heart of most simple haul systems.

On a tree job that might mean hauling a heavy saw or a bag of rigging up to a climber, building a quick mechanical advantage to tension a line, or keeping an aerial rescue setup simple. Some climbers also carry it as a backup rope grab for their SRS system. It saves carrying a separate pulley and ascender, which keeps the saddle lighter.

Setup and safety

Read the manufacturer's instructions for this device and confirm the rope diameter and construction you climb on falls inside its approved range. A device that grips well on one rope can slip or bind on another, so test it low and slow on new rope before you trust it at height.

Inspect the cam teeth, springs, side plates, and attachment points before every climb, and keep the device free of sap and grit. Life-support gear must meet the applicable standard (ANSI Z133 and the manufacturer's instructions), be inspected before every climb, and be used only by trained climbers. Never improvise a configuration the maker does not show. Compare other options in ascent and descent gear.