The Parker-brand shavettes that I'm talking about today have a blade that acts similarly to the pieces of bread in a sandwich, enclosing the sharp edge between the blade sides.
Some new users have remarked in reviews about the difficulty of opening the razor for blade insertion/removal. At least one reviewer has suggested the use of prying tools. This is NOT necessary and not recommended.
To open the razor, obviously you should pivot the scales so they are in line with and opposed to the blade assembly.
Then open the clasp to a 90-degree angle to the blade. This will make it possible to separate the upper- and lower-blade halves.
Next, hold the shank of the blade in one hand, ready to fan the two blade halves apart like one would fan a hand of playing cards. Then the trick is to simply press the tip of the thumb of your free hand (the one not holding the razor shank) into the indentation at the point of the blade. Your thumb tip acts like a wedge to separate the blade halves enough that the top half rises above the pins of the bottom blade, thus allowing your hand holding the shank to fan apart the two blade halves.
From there it's easy to insert a fresh edge (half-DE blade), and close up the razor for shaving.
Garage Sale Continues -- Make Me an Offer