I bought this product to do some roof repairs. It fit my ladder, also a Werner, perfectly and easily. In my younger days I had a pair of the old steel finger biters but had long ago given them away. These are a great replacement. They do take up more space for storing but that is a small price to pay for the overall quality and stability. I opted for the larger units so as to accommodate an aluminum walking plank. I haven't used them for under the ladder as yet but am sure they will work fine for that position as well. I would recommend even for the weekend warrior!!