If you have a mechanic shop or in auto restoration, buy the best tools. A onetime use, buy the part, ready to go. Last year I converted my 69' 340 Dart drum brakes into disc (front). Took me several hours to take down the KH set up to restore. Once apart, the inners were shot and I ended up buying the calibers redone, anyway. The remanufactured calibers work great. No more wasted time or bruised knuckles. If you do your own bending, stay away from the stainless steel. Never heard of a good outcome.