New utility knife! On the left, the “Palmer” from James. On the right, Studio Neat's “Keen”. The weights feel similar, but the Keen is much smaller and has a very satisfying slide, especially compared to the Palmer which sometimes caught in its 3/4 blade-removal state and forced me to fiddle with it to fully extend or retract.
The back comes off without tools but the magnet holding it in place is strong; I can see maybe breaking a nail opening it.
The blade can be flipped for lefties.