ya i remember some of the slammers i had...i had this one that was shaped like a ninja star, great for knifing
also had this one that was like a quad slammer...it was as tall as it was wide...it kinda sucked to use but was awesome to put up for battles.
ones with finger grooves...
and one i still have, it has a scorpion inside...but it is actually a pog...haha