Secure Tools supplies Metric Half Moon Wrenches. They are specialized tools commonly used in plumbing and pipefitting applications. They are designed for tightening or loosening nuts and bolts with a half-moon or crescent-shaped opening at one end.
The half-moon opening of the wrench provides a secure grip on hexagonal or square-shaped nuts or bolts. It allows the wrench to engage multiple sides of the fastener, providing a larger contact area and reducing the likelihood of slippage.