Gosknor 5 Stuks Hardmetalen Frezen, 100mm Lange Schacht, Compatibel met Dremel Cut Port Gietijzeren Stalen Aluminium Cilinderkop Motor Inlaat Uitlaatspruitstuk voor Moeilijk Bereikbare Plaatsen

too long for the size of the heads. they vibrate if cut down to 2 inch long they work OK

Using full length it wobbles and bent. After a few minutes the shaft broke about an inch off. Removed broken piece reinserted worked perfect. The grinding head must be pretty good quality used to grind steel for at least 45 minutes completed project with little to no ware. Cut an inch off seems to work much better

Exactly what I needed. I don't plan on using these all the time, I got them specially to gasket match my supercharger to my cylinder heads. I know the limitations of these bits and only plan on using them where needed at low speed. I may trim the shaft down to keep my runners uniform, I'm waiting on my parts now. Will update if there's an issue.

They work but can’t sustain any rpm without warping. If I’m using them wrong then it’s on me. As well won’t stay in the tool as it shakes out