T & E Tools Brake & Fuel Line Tube Straightener 7729. Designed to straighen annealed copper and stainless steel tubing The hard polymer rollers and ball bearings, leave a smooth action and finish on tubing. The U-shaped rollers straighten different tubing sizes without the need to change rollers. The unit can be mounted to a table or used on a vise-mounting base. Vise or Bench Mount. Fully adjustable from 3/16″ to 5/16″ tubing. Vise or bench mount double brackets. Can be used on all types of tubing. Makes coiled tube straight. Size: 3/16″ to 3/8″ (4.75mm to 10mm).