ISC Twister SuperSafe Swivel Carabiner 27kN arborist knots book The CL-3502C includes a steel

The CL-3502C includes a steel insert for added rigidity and pressure distribution

The US Rigging Aluminum Autolock Carabiner delivers exactly that — a lightweight aluminum body paired with a heavy-duty autolock gate that won't accidentally open under load or vibration

while the ring-style straight stirrup keeps your foot stable and secure

Ideal for arborist climbing systems where rope management is critical

ISC Twister SuperSafe Swivel Carabiner 27kN arborist knots book The CL-3502C includes a steelISC Twister SuperSafe Swivel Carabiner 27kN MBS The ISC Twister was purpose built for one of arborist climbing's most persistent annoyances: twisted climb lines. Designed specifically for flipline and lifeline terminations, the Twister's integrated swivel allows your rope to rotate freely at the connection point, continuously relieving torsional buildup before it becomes a problem. Double locking gate for security you can count on at height. At just 5