Silverline Lock Rod Double Worm Screw For Locking Drain Rod System The Silverline lock rod double worm screw is designed to be used with the drain rod system. The knurled design provides an enhanced grip when unblocking, not only this but this worm screw is also fitted double-locking fitting. Features: Double locking screw Provide an enhanced grip when unblocking Specifications: Size: 50mm double worm screw
