I've been running Flail Mowers for over 30 years so I understand what a scoop knife is and it was noted in my 1st reply that I was refering to such.... All I'm saying is that there are options other than Flailmaster for replacement parts. Just sharing information that may be useful to members, obviously other than yourself. Whether or not thicker materials apply to all parts this manufacturer makes remains to be seen. For my use and others who run (scoop knives) the Hardhitter part is far superior and less expensive than Flailmaster. BTW, Not all Caroni units use Y knives and not all members here use Caroni mowers... This is just a FYI for anyone who may benefit from the information. <img src="http://www.tractorbynet.com/forums/attachment.php?attachmentid=474709"/>