The knife with interchangeable blades I can highly recommend: Begins with the clip to put it on his trousers or the like to fix, continues through the very fast and easily accessible compartment for spare blades, for me the great good grip and culminates with the ingenious mechanism, fold away the knife. Operating totally simplistic, the knife in any way. Refined and sophisticated. Actually, a must for every of such a craft carpet multi-blade razor maintenance required.