Features: It makes clamping fuel, vacuum, brake, heater line, etc. very convenient and practical. Unlike spring clips, springs cannot be bounced or loosened by thumb screws. U-bolt type The set covers many pipe sizes. Suitable for fuel lines, vacuum lines, transmission lines, brake lines, heater lines, etc. Clamp 1 up to 3/8 Inch (10 mm), Clamp 2 up to 1/2 Inch (15 mm), Clamp 3 up to 1 Inch (25 mm), Clamp 4 up to 1-3/4 Inch (45 mm). 4-Piece Tube Bundle Clamp Set / U-Shaped Tube Sealing Pliers Size: 3/8 in, 1/2 in, 1 in, 1-3/4 in. U-bolt type The set covers many pipe sizes. Suitable for fuel lines, vacuum lines, transmission lines, brake lines, heater lines, etc. heater lines, etc. Practical hose clamps are essential for mechanics and automotive specialists to clamp fuel, vacuum, transmission, brake line, heater lines and other fluid lines safely and easily. Each hose clamp is specially designed to stop the flow without damaging or compromising the hose, which makes this a great set of