VERSATILITY: Mini tube bender works on three different sizes of tubing: 1/4-inch, 5/16-inch, and 3/8-inch APPLICATION: Designed to smoothly bend copper, brass, aluminum, and other thin walled steel tubing without crimping ACCURACY: The marked degree gauge allows you to make accurate bends from 0 to 180 degrees with no guess work needed! Avoid collapsed tubing and inaccurate bends with our 3 in 1 tubing bender ABSOLUTELY SAFE: Rugged aluminum alloy construction with durable, baked enamel finish. Non-slip handle for safer use MULTIPLE USES: Ideal for refrigeration, climate control, oil supply, automobile, hydraulic and air pressure systems Size and Usage The angles and bending information is etched directly onto the tool for quick and simple ease of use. The three channel design also allows users to work with tubing that comes in a variety of sizes: 1/4(6mm) 5/16(8mm) 3/8(10mm) A Versatile Tool The 180 Degree Tube Bending Tool is designed to smoothly bend a variety of tubing materials without crimping: copper brass aluminum other thin walled steel tubing Ideal for several water, gas, refrigeration, and brake line applications.