Deutsch HD10 Series Strain reliefs are designed to screw onto threaded 3, 4, 6, and 9 cavity HD10 connectors. The rigid, durable Strain Reliefs offer a high level of protection, provide tie wrap holders to reduce the strain from the wires, and improve aesthetics. These Strain Reliefs improve the life of the finished wire or cable connection and help create a nice, neat finish. This gray Deutsch HD10 Strain Relief is designed for Deutsch HD10 3 contact connectors.