Heavy Duty = Buy if you have very strong hands. 3.5 inches = Approximate hole size, not length. NOW I KNOW. If I returned this item for $7.99 I would get $3.00 back. I will give them to the master who will help me with honeydos. When I tried to check if I had made a mistake, the product link took me to a similarly labeled product. 6. Read several options carefully before buying them. Now I've ordered something different (1 inch: hole) and just by enlarging one of the illustrative images I could see that in fact the end of each handle had a hole. This could be a handy feature to add a ring and use for keys or for hanging a key holding clamp. in a stack of documents or attached to an object to provide a pen - to me they have many office and household uses.