Useful additional 3.4 gram Die cast  Mounting plate  to allow fitting a standard 1/2 inch mounting centres cartridge to be fitted to tone arms that only have a single mouning screw

Three tapped holes to accommodate machine screws only  ( usually 6 BA threads ) use self tapping at own risk! 

Install between cartridge an headshell , will also  assist in obtaining the correct arm balance/ tracking force when adustment difficult or unobtainable by other means...