The Harken Standard Cam-Matic Aluminum Cleat - 150 (Part No. 150) has a minimum line diameter of 3mm (1/8 in) and a maximum line diameter of 12mm (1/2 in). It can handle a maximum working load of 136kg (300 lbs) and is designed with ball bearings for secure line holding and easy trimming. The hard-anodized aluminum construction allows for constant adjustment, heavy loads, and frequent use, making it ideal for any sailing situation.