Gridfinity X-Acto and Blade Trays

Three trays for holding your X-Acto or Excel knives and blades.  They will also support many scalpels.  You can press down on the end of the handle to pop up the back.  There's also a finger notch.

One tray is setup for standard handles.

One is setup for one each of large hex handle, retractable, and the skinny pen type retractable.
 

One is purely for blades, storing some tip down in bulk, and some side by side on a magnetic strip.  For this I inlaid bar magnets I had lying around (4.7mm x 9.6 mm x 2mm).

All three are 2x4x1 in the Gridfinity system and should allow for a lid or stacking if needed.