One of most annoying things that happens to technician is
     to have a blade break when he is in the middle of a job.
     To change a regular cold knife blade you must remove
     two screws and one bolt assembly that includes four
     different parts. It can drive you crazy when you are in the
     middle of a job and in a hurry. Now you can change that
     blade in seconds. Just push the button in the end of this
     cold knife and it releases the blade. Changing a blade
     takes only about two seconds ! Intended for use with 3/4"  
     wide blades.
　

Some of the best knives in the world are made of
     stainless steel.
In recent years Reid has introduced stainless steel into their
     line of cold knife blades.
These cold knife blades are sharpened, hardened, and
     then honed to produce a razor sharp blade.