This is one of my first Fusion 360 models. The first full print of it broke a little when I tried to put it on my pegboard. The pegs where a little to large. I have fixed it in the model but have not printed another. I was able to get it to mount by drilling out the pegboard holes a little. It is now happily storing my putty knifes in my workshop. I have included the fusion 360 file so it is easy for anyone that wants to remix and improve.
The back two slots are thin for metal blades and the rest are sized for plastic blades. The blade holder could be made thinner. I don't think the putty knives need a slot that is over 1" deep to be stable.