I purchased two Sand Shark ultimate anchors a year or so ago and they have been the best anchors for my jetski's in the gulf. The weekend before the 4th of July, we were anchoring at our favorite sand bar and I realized that I had lost one of the screws. I had a spare anchor that I used for the day but I had to keep checking because it would break loose. I ordered replacement screws on Saturday night and paid for expedited shipping. Later in the week I tracked the package and found out that they were not going to be delivered on time for the upcoming holiday. I contacted Duane and he overnighted extra screws at no cost to me. These are the best anchors for my jetski's that I have tried. And the service is exceptional.