Key benefits THandle Drain Plug provides a twist/turn mechanism for a reliable leak proof seal. Constructed from stainless steel and Nitrile Butadiene Rubber (NBR); resists heat, antifreeze, oil and rust, and offers wear resistance with wetdry versatility and airtight performance. Durable and sturdy, not easy to deform for long service life. What this plug is Universal Rubber Expansion Plug and adjustable stainless steel scupper plug designed to standard test and seal plugs for various drainage holes and pipe openings. Compatible with sizes from 1' to 4 1/8' (25105 mm). Round rubber pipe plugs suitable for low pressure and leakage tests, drain pipe sealing, and cleanouts in kitchen, bathroom, garden, automotive, construction, and marine applications. How to use Easy installation, no tools required. Turn the handle clockwise to squeeze and expand the rubber until the hole is clamped for a leak proof seal. Turn the handle counterclockwise to release the rubber and remove for next installation. Designed for reliable, practical, and convenient use. Where you will need this Widely applicable for sewer pipe lines, fountain holes, basements, garage drains, and septic systems. Suitable for bathroom sinks or showers, winterizing swimming pools' skimmer and lines. Works for motorcycles, cars, trucks, lawn rollers, water tanks, intercoolers, boat hull livewells or bailer drains, water mouths, and other appropriate holes in the right size and environment.