Remo Innovations Include Beefing Up Its Bass Drum Hoops With The New Crimplock Flesh Hoop. These Stronger Flesh Hoops Give The Increased Confidence, Stability, And Tuning Range Necessary For High-Register Bass Drums (16 - 22") In Drum Corps And Marching Bands. The New Crimplock Bass Drum Heads Benefit From Remo’S Advanced Manufacturing Technology By Incorporating A Heavy-Duty Aluminum Hoop Crimped Over A Resin-Filled Channel. Because The Tolerances Of Bass Drum Counterhoops May Vary, This Newly Designed Hoop Enables The Head To Disperse Enormous Tension Evenly And Without Pull-Outs. These New Bass Drumheads Are Another Durable And Musical Contribution To The Needs Of The Marching Bass Drum Players. For Schools And Corps Who Tune Their Basses To The Extreme, These Heads Will More Than Meet The Challenge.