
The handle is very well made and I was immediately impressed. It comes with a single blade cartridge already installed. I've been using this blade for about 1.5 weeks and now I'm having problems. I then removed the blade and tried replacing it with a new Mach 3 cartridge. The pen will not accept the new blade. I know I have the right blades because I have another Mach 3 razor that I use when I travel. The blade fits this razor perfectly. I compared the Mach 3 grip to this one and the area of the head where the new cartridge attaches is smaller and narrower. New blades just fall off this new handle. They fit but don't stay in place and fall off immediately. I will return immediately. Very disappointed, especially after reading the great reviews on this pen.

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