Bass Drum O"s Bass Drum & Tom Hole ReinforcementOverview:From Big Bang Distribution: These replicate the original bass drum hole reinforcement, snap on design, with a variety of configuration in size and now colors.2 inch tom ports added2 inch Tom Port O"s designed for Toms and for multiple Bass Drum configurations. Tom Port O"s allow for minimal head removal with more variety in tunable ventilation as well as external microphone access. 2 inch Tom Port O"s come 2 per pack.Well packaged and flawlessly designedBig Bang Distribution has made sure that the products are well packaged and flawlessly designed.Speed hole cutter availableThe Speed Hole Cutter works much like a compass and can adjust to cut perfect holes in drum heads from 2 to 6 inches..