Opis Gibraltar SC GPHCUT rezač za rupu na bas bubnju. The Port Hole Cutter from Gibraltar Hardware allows you to cut your own portholes into your bass drum resonant head. The cutter allows you to cut perfect 4 inch and 6 inch port holes into the drum head. It comes fitted with a metal tack which pokes a hole into the drum head and secures the cutter and the head while you cut the hole.The entire process is very easy, all you have to do is to spin the cutter and the circular blade does its job.