Such as this one:
http://www.harborfreight.com/air-too...der-66621.html

Does it retain the chisel better than the spring? I'm having an issue
where the chisel flies off. Very annoying when I'm working on the 2nd
floor and it drops to the 1st floor. 'Kinda irritating to the guys on
the 1st floor who have to dodge it, too.

Thanks,
Bob