I’ve been using a Mach 3 as my travel razor for about 10 years. The old handle has been ok, but the plastic has hardened and has gotten slippery and dangerous. I wish I had bought this Parker handle years ago. It is the perfect weight and balance, and the textured handle is grippy even when soapy, without being rough on your fingers. It’s a pure pleasure to shave with. If you use a Mach 3, do yourself a favor and buy one of these handles now. You won’t regret it.