Here are 2 essential tools when forming coated tubing: rolling action tubing bender (3/16in. and 1/4in. O.D.) and heavy-duty tubing bender (5/16in. and 3/8in. O.D.) for thick walled tubing. Both utilize a free-rolling follower CAM to minimize stretching and distortion. Will not harm protective surface coating on fuel and brake lines. Comes apart easily for easy placement over long pieces of tubing. Made in England.