What's the one tool you inherited or found that feels like it has someone else's hands in it?

I'm in the shop this morning, sharpening a bone folder that belonged to a binder from Glasgow, and I swear I can feel how he held it. The wood is worn right where his fingers would have been. Do you have that one thing—a chisel, a spatula, a pen—that just feels like it's still warm from another person's work?