Same as a magnus , Great broadhead . They have allways flown great for me . Uncle Teddy did a show where he was pulling 50 lbs , he shot a zebra and got a pass thru and recovered the animal quickly . Sometimes they will come lose from the screw in ferrel they come with , all thats needed is some hot melt glue and spin um to check for allinement . They are easy to sharpen and not too expensive . Uncle Teddy allways says if it worked for the native americans for hundreds of years , it will work today . I think its an excellent design especialy if you are shooting lower weight or lighter arrows . Year before last I shot two deer with them and both went down within my sight . I love it when that happens . Lots of advise from others said " they will plane " but I never had that happen . They have allways grouped better than other broadheads I' ve shot .