Product Description 1. The safety locks are made of Imported Dupont Nylon,standard and robust,meet the OSHA1910.147 regulations. 2. 1-1/2”(3.8cm) wide 1-3/4”(4.5cm)tall thermoplastic body, 38mm shackle clearance. 3. Compliance with OSHA “one employee, one lock, one key” ...