This is the second set of six prong bucket attachments for a 60 inch bucket I have ordered from Titan. I am pleased with the first set of prongs I Purchased. The first set had the tightening bolts with a round hole and a square head for tightening the attachment to the tractor bucket. The set of prongs I just ordered had tightening bolts with only a round hole at the top to tighten the attachment to the tractor bucket. I am thinking this will fail me in the long run because I can not tighten the bolts tight enough to keep the attachment on the tractor bucket. I would like to have tightening bolts with a square head on top for tightening the attachment. I purchased the new set of prongs for a second tractor that is located on another farm seven miles away from the other tractor with the original set of prongs.