KWB 3/8" Swivel Self-Locking Hook - Grade 100KWB Grade 100 Swivel Self Locking Hook The KWB Grade 100 Swivel Self Locking Hook is engineered for demanding overhead lifting and rigging applications where both load security and proper load alignment are critical. Manufactured by KWB, a Pewag company, this premium European made Grade 100 fitting combines a durable self locking mechanism with a swivel design that helps the hook align naturally with the load, reducing chain twisting and binding