A "cut-in" (or self-cutting) waste plumbing kit is a specialised adapter used to connect a washing machine, dishwasher, or washer-dryer drain hose directly to an existing plastic waste pipe (usually standard 32 or 40mm pipes without having to cut out a section of the pipework or install a traditional glued T-junction. The kit features a saddle clamp that fits around your existing waste pipe. As you tighten the fitting (or turn an integrated steel cutting tool), it cleanly drills/cuts its own hole directly into the plastic pipe wall. Rubber washers/gaskets inside the clamp seal tightly around the newly created hole to prevent leaks A nozzle/spigot extends outward with a barbed connector, allowing you to attach your washing machine's flexible waste hose and secure it with a jubilee clip.