ONE + ONE HITTER = TWO HITTER - MADE FROM #304 STAINLESS - BETTER THAN ALUMINUM.  I had an early cannabis dispensary in Traverse City that was raided by the f'ing TNT (Traverse Narcotics Team).  They were kind enough to leave these behind.  Custom made in Michigan of #304 stainless steel 3" long and 9mm in diameter, these are actually two hitters, they are drilled out deeper than a one hitter.  These weigh 33 grams each, about 3 times as much as aluminum.  For me they are one big huge hit.  Engraved with the name of the collective/dispensary.  Smoking with stainless is sooooo much better than aluminum.  Hefty.  Beefy.  Cutting edge can do some damage.