Mortising Machine chisel safety cap set

I store my mortiser chisels on a wooden rack next to my mortiser, which I have to reach around to turn my air compressor on and off. The original cap for the 3/8 chisel went away years ago and I got sick and tired of scratching myself trying to turn the compressor on...

These are sized for 1/4, 3/8, and 1/2 chisels for the old Central Machinery (Harbor Freight) mortising machine but I suspect would fit the chisels on any machine. The fit is friction tight although if I had fettled down the sides of the chisels they might be a touch sloppy.

I printed them with Safety Orange PLA to make them more visible, that way if they fall off onto the floor I can find them easier...