♥ Contains everything need to fit any phonos cartridges . This selection of bolts, Nut and washers cater for a full ranges of cartridges body depths. ♥ Manufactured from high strength steel not aluminium since many cartridges manufacturers specifically advise against the use of aluminium. ♥ Please secure that the cartridges is Accurately fitting to the headshell making sure you for always use the shortest bolts that will accommodate your cartridges / headshell combination. ♥ The Tool for head on the bolts allows for easy tightening with the supplied Hexagonal . ♥ this 6, 8, 10 & 12mm bolts for mounting the majority of cartridges in the market. The 16 & 20mm bolts included for the bodied cartridges and the 2mm bolts (10mm & 16mm) included for the majority of headshells.