... and it worked very well. In my case, I drilled my own pilot holes for the axels (nails) instead of using the slots that come with the block. The key is getting the pilot holes at a good angle. I had access to a drill press and put a shim under the edge of the block to get the angle I wanted. Don't remember the exact angle or size of shim, but the key is to have it consistent for all 4 pilot holes.