This is a great product. I only steaked 1 tuna with it but it went through the bone easy. I highly recommend.ADD A MAKITA ''ONE HANDED RECIPROCATING SAW'' AND YOU'LL NEVER FEAR ANY FISH OR LARGE GAME. THESE BLADES WILL CHANGE YOUR LIFE IF CLEANING LARGE NASTY TOUGH FISH IS WHAT YOU DO. FILLETZALL STANDS BY IT'S PRODUCTS 100% WITH SUPER CUSTOMER SERVICE IF YOU HAVE A ISSUE.CHANGE YOUR LIFE........AFTER A LONG DAY OF FISHING OR HUNTING WHY SPEND ENDLESS HOURS IN THE HEAT CLEANING TOUGH FISH LIKE GROUPERS, SNAPPERS, SHEEPSHEAD, REDFISH, BLACK DRUM, TRIGGERFISH, SHARKS, ETC. WITH A PLAIN OLD KNIFE?WHEN YOU ADD THESE BLADES TO YOUR MAKITA OR SIMILAR CORDED OR BATTERY OPERATED ONE HANDED RECIPROCATING SAW, ITS ''GAME OVER!'' IN MINUTES!USPS fouled up the delivery, but the seller made giid without hesitation. They deserve 5 stars for taking the hit. The blade itself is solid. Steaked up a 50lb cobia with ease. I will be back for more.Best knife to clean large fish.Cuts right thru large reds and black drum. Take some getting used to though.Works greatPerfect!This blade made cleaning my big grouper a snap!! I also used it on a 15 lb. snapper and it took me just a matter of literally seconds to get the fillet off of the body. I highly recommend using this if you are catching big fish.