Never had any luck with most of the Olson blades , but any blade can always give you problems for one - the speed is too fast - the pressure your applying is too much - the type of wood your using - in general sometimes it's possible a bad blade can get by - and also it could just be one of those days that you should have stayed away from the scrollsaw , and I've had a day like this before . But in general Mike's F-D Blades are the best in all the years I've been scrollong , like I've said some days - are better in the house watching TV . I don't have these very often, and another thing is when you've had a long day at the saw and things seem to start going wrong or not good in you line of thinking - it would be good practice to learn how to quit and go in . My two cents worth .......But Mike's Blades .............MB