You get what you pay for

I recently came across a forum post regarding a large silver knob sold by Hegner. This part can replace the standard upper blade holder if you need to feed the blade through an entry hole. I use it all the time for bowls, and also for cutting out the inside of boxes.

I was aware that there is a lever available for the Hegner that serves the same purpose as the knob, and is a lot cheaper. This lever is not made by Hegner. I was curious about the difference between the two, and why the knob is so much more costly. It seems that what looks like a threaded bolt attached to the knob actually has a pivot at the end that keeps the blade from bending or twisting as you tighten the knob.

It's still an expensive piece of equipment, but like the rest of the saw, really does a great job.