This is a straight edge razor contained within a metal case secured by a metal slide holder that can be pushed forward to reveal the edge and backward into the case to hide the razor's edge. It's not the best sliding mechanism but it functions. I have arthritis and wanted something small that will fit on my computer stand and get be able to conceal the blade for safety. Because the slide is tight I find myself pushing the blade back into the case on the table top rather than easily sliding the holder back in. But it still functions ok.