Feature: 1,This stainless steel kits can be sucked by a magnet.This Universal Cartridge Mounting Kit contains everything needed to fit any phono cartridge. This selection of bolts, nuts and washers cater for a full range of cartridge body depths. 2,Please note that this mounting kit is manufactured from high strength stainless steel not aluminium since many cartridge manufacturers specifically advise against the use of aluminium. For example the installation instructions for 2M cartridges clearly states "Never over tighten and never use aluminium , as they can get stuck in the threaded holes of the mounting plate". The weight of stainless steel bolts for versus aluminium or other materials is also irrelevant since you should for always adjust the counterweight at the rear of the arm to ensure that you have set the correct Vertical Tracking Force (VTF) recommended for your cartridge and stylus. 3,To get the best performance from your equipment it is imperative to ensure that the cartridge is correctly fitted to the headshell making sure you for always use the shortest bolts that will accommodate your cartridge / headshell combination. The socket for head on the bolts allows for easy tightening with the supplied allen keys. 4,The 6, 8, 10 & 12mm bolts are perfect for mounting the majority of cartridges on the market. The 16 & 20mm bolts are included for the deeper bodied cartridges and the M2 bolts (10mm & 16mm) are included for the majority of Thorens headshells. Specification: Color: Silver Material: Stainless Steel Size: As the picture Quantity: 1pc Note: And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! This full kit includes: 2 x M2.5 x 6mm stainless steel allen bolts 2 x M2.5 x 8mm stainless steel allen bolts 2 x M2.5 x 10mm stainless steel allen bolts 2 x M2.5 x 12mm stainless steel allen bolts 2 x M2.5 x 16mm stainless steel allen bolts 2 x M2.5 x 20mm stainless steel allen bolts 12 x M2.5 stainless steel nuts 12 x M2.5 stainless steel washers 2 x M2 x 10mm stainless steel allen bolts 2 x M2 x 16mm stainless steel allen bolts 4 x M2 stainless steel nuts 4 x M2 stainless steel washers 1 x 2mm Allen for key (for M2.5 allen bolts) 1 x 1.5mm Allen for key (for M2 allen bolts