Yes, all Dorco razor systems and cartridges on our website with the exception of the Pace Comfort Thin II, (TNA3006) are interchangeable. You’d be able to use a 4 blade razor handle with a 3, 4, 6 or 7 blade razor cartridge. This works for all systems and cartridges on our site -- both men's and women's. To view a video about our common docking technology click here.
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