I specifically wanted one of the chalk-spraying types -- they just seem like they'd work better to me. Plus, the idea of making it spit chalk by squeezing the bulk just seems more fun. It appears to take cartridge refills -- hopefully I'll be able to find more, or refill the current cartridge. Anyhow, mine is the Dritz Scovill version from the 1960s, and it's full of chalk dust and ready to rip. Too bad my current project is a top. But next time I make something with a skirt, I'll be happy not to have to painstakingly mark and measure all the way around.