I purchased the short version as they were on clearance, and i needed 3 for my catamaran. I did have to enlarge and re-seal the holes to accommodate the angle of the drain and inside handle. I would recommend the long version if you want to reach them from the bilge and your transom is over 2" thick, as mine is. The short versions may work great on an aluminum boat though. I am very happy after the install as its very convenient to not have to search for the plugs or a wrench. Make launching and hauling that much quicker!!!
Someone finally came up with a design that I've been searching for for several years now. I am doing a complete restore job on a 26'ft project boat and this little gem is better than what I had in mind. The quality is of very high standards.