Feature: 1. This stainless steel kit is compatible with magnetic surfaces. This universal cartridge mounting kit includes all components necessary to install any phono cartridge. The included bolts, nuts, and washers accommodate a wide range of cartridge body depths. 2. This mounting kit is made from high-strength stainless steel, not aluminum, as many cartridge manufacturers specifically advise against using aluminum hardware. For example, the installation instructions for 2M cartridges state, "Never over tighten screws and never use aluminum screws, as they can get stuck in the threaded holes of the mounting plate." The weight difference between stainless steel and aluminum is negligible, as the counterweight at the rear of the tonearm should always be adjusted to achieve the recommended Vertical Tracking Force (VTF) for your cartridge and stylus. 3. For optimal performance, ensure the cartridge is properly mounted to the headshell by using the shortest bolts suitable for your cartridge and headshell combination. The socket head design allows for easy tightening using the included Allen keys. 4. The 6 mm, 8 mm, 10 mm, and 12 mm bolts are suitable for most cartridges on the market. The 16 mm and 20 mm bolts are included for deeper-bodied cartridges. M2 bolts (10 mm and 16 mm) are provided for compatibility with most Thorens headshells. Specification: Color: Silver Material: Stainless Steel Size: As shown in image Quantity: 1 piece Note: The actual color may vary slightly due to differences in monitor displays. This full kit includes: 2 x M2.5 x 6 mm stainless steel Allen bolts 2 x M2.5 x 8 mm stainless steel Allen bolts 2 x M2.5 x 10 mm stainless steel Allen bolts 2 x M2.5 x 12 mm stainless steel Allen bolts 2 x M2.5 x 16 mm stainless steel Allen bolts 2 x M2.5 x 20 mm stainless steel Allen bolts 12 x M2.5 stainless steel nuts 12 x M2.5 stainless steel washers 2 x M2 x 10 mm stainless steel Allen bolts 2 x M2 x 16 mm stainless steel Allen bolts 4 x M2 stainless steel nuts 4 x M2 stainless steel washers 1 x 2 mm Allen key (for M2.5 bolts) 1 x 1.5 mm Allen key (for M2 bolts)