Tylaska Basilisk LFB-20

The Tylaska Basilisk LFB-20 is a machined low-friction device that gives a rope a smooth surface to run on, used for rigging points, redirects, and lowering setups. It is a light, sealed alternative to a block when you want less wear on the rope and tree.

Where the Basilisk fits

Tylaska is known for machined low-friction rings and fittings that started in sailing hardware and moved into tree work. The Basilisk line comes in several sizes; the LFB-20 is one step in that range, so check the manufacturer's sizing chart against your rope and loads.

A low-friction device sits between a pulley and a natural crotch. There are no bearings or sheaves, so it tolerates grit and sap well, and it is lighter than many blocks of similar size. The trade-off is more friction than a true pulley, which can help a groundie control a load but means more effort when hauling.

Many climbers also use low-friction devices for redirects and for small speedlines or retrievable setups, where a clean, snag-free surface matters more than raw efficiency. Because the device is a single machined piece, there are fewer things to check, but the rope-bearing surface still needs to stay smooth.

Using it safely

Pick a sling and connector rated for the loads you plan to put on the system, and confirm rope diameter compatibility with the manufacturer before you buy. Compare it with other rigging rings and hardware to see which style suits your work.

Check the rope-bearing surface for burrs, grooves, or rough spots that could damage rope, and retire the device if it is cracked or deformed. Rig only within the rated strength of every component in the system, inspect gear before each job, and make sure the crew is trained in rigging practice under ANSI Z133 and the manufacturer's instructions.