I bought this to replace the bit in my Bosch hole saw kit. part was an exact match. The price was reasonable online. The quality of Bosch tools is usually very good, no idea why the original broke.
I use these bits for Bosch quick change bits. The nicest tools I've bought in a long time. The only problem is that they don't last very long if you use them caught in a standoff Otherwise a great tool.
I work on doors a lot and I love the versatility of Bosch quick change hole saw sets, but I have a problem with these particular bits constantly breaking or breaking. . Over the past year I've tried about 5 of these nozzles and they just clicked when cutting different sized holes in steel doors. The hole saw will catch and this bit will break. Happens too often. I also wish the quick release feature had a tighter tolerance so the saw wouldn't crack as much.