Holes need to be a little larger. The spacing has difficulty matching just one set of holes as well. Product is a good starting point t though. You can modify the shank without loosing strength as well.
They will bend if you hit boulders. Bent a tooth and bent one shank sideways after hitting some boulders in sand. I will straighten the bent shank and reuse it. This set came with pins keepers and two extra shank tips.
Item as described, arrived unbelievably fast, very happy with the purchase, great value. I mounted them on a bar to loosen up the soil a bit prior to planting on a small plot for the deer.
Thank you.
Ryan 
Nick 
Eric 
