The Mech Expansion Plug T-Handle is a mechanical expansion plug tool used to plug holes in pipes and tubes. It has a T-handle for easy turning and a tapered expander that expands when turned to seal off openings. The plug is made of steel and can plug holes in steel, iron, copper and plastic pipes. It has a temperature range of -20 to 250 degrees Fahrenheit. The overall length is 3-3/4 inches and it can plug holes ranging from 3/8 inch to 1-1/4 inches in diameter. This durable, heavy-duty tool allows quick plugging of pipe openings during repair and maintenance work.