Mazzolini Record Clamp &ndash; Turntable Disc Stabilizer The Vi Clamp&trade; Vinyl record player clamp attaches to your discs for increased stability Record clamp weight stabilizer weighs just .52 lbs., is 3.5 in diameter and 1.5 tall Easy-to-use clamp boosts LP sound quality and gives music lovers a better experience Your treasured disc is protected from harm by a felt ring on the bottom of the clamp Aircraft Aluminum clamp fits standard .282"(7.2 mm) center spindle non-threaded turntables