Includes one knurled protective cap for Rotring 600 series mechanical pencils. The Rotring 600 is my main pencil and I love using it. I made these caps because I wanted a simple way to protect it, so I could toss it in a bag or pocket and take it anywhere with peace of mind, knowing the tip stays safe. (does not include pencil) Drop tested from 4 ft, 3 drops until the cap was damaged, the pencil was fine. You get 2 caps with your order; great, eh. p.s. I've got to warn you; It's pretty awesome.