I was gifted a SAK a while ago. Originally the scales were camo, which made it hard to find when dropped in grass. I didn't use it much for fear of losing it.
So gave it new yellow scales, the plus ones that add the pen slot, then added the pen, a red pin and and corkscrew screwdriver.
I have a Tinker redone in yellow on my keychain and finding my keys has become way less difficult. I've had the knife for three decades and it didn't truly become my EDC until I rescaled it.