In the picture provided above, you can see that the main structural attachment for the blade is a multi-lug clevis joint with two shear bolts. The only thing that seems different with this design is the type of shear bolt used. Most of the similar blade attachments I have seen use an "expanding" shear bolt, which has a set of split taper bushings that expand in diameter when the nut is torqued, to eliminate any clearance between the bolt and clevis bores, creating an optimum fit.
