I was on the Paladin site last night looking at something else and saw the Scarifier. It does look identical to the BC one I bought 20 years ago. There are no shear bolts and you don't need them. The shanks are strong and cheap as are the replaceable teeth. The Teeth are peened on to the shank. So you need to torch them off for replacement. They don't pin. You really cant break this attachment. I use my 90hp CTL on them and I have never broke it and the ground here is river rock with some dirt sprinkled in. I have only used it in reverse, I don't think you can turn the shanks around based on the way they sit in the attachment, but honestly I would have to confirm that. It works really well going in reverse. It is really handy when you need to work highly compacted soil, saves a ton of time. Having a high hp CTL, makes it even more helpful. If your running into having to break up compacted soil it is like the pocket on your shirt. The attachment will fit in your dirt bucket, easy to carry around.