Pearl HEAL1465 14 x 6.5 Inches Hybrid Exotic Snare Drum - Cast Aluminum Fat midrange focus without sacrificing volume. Pearl"s SR-1000 Glide-Lock Strainer"s locking throw-off lever and tension knob assures worry free, slip-free performance from all Hybrid Exotic Snare Drums. (US Patent #7220905, #7301087, #7365256.) Cast Aluminum: 3mm w/ 2mm R-Rings Features Pearl"s new Spin-Tight tension rods. This elegantly simple innovation creates a tension rod-within-a-tension rod, that allows the rod to expand and lock into place within the swivel nut.