Review (5/5): Perfect fit
Mach 3 cartridges clip on and off with no problems. The handle itself is a touch longer than the original Mach 3 handle. Easy to hold and light weight, about the same as the original.
Only things I would change would be adding texture to the handle like on gym weights (note the handle is not slippery) and instead of shiny silver, have a brushed silver finish.