The Floyd Rose Fat Brass Block will add mass and sustain to your Floyd Rose tremolo bridge along with the tonal qualities of brass. The sustain block will fit all Floyd Rose Original models, Non-Fine Tuner and 6 string Pro series, 1000 series and Special series tremolo systems. Brass has been a much desired material for guitar luthiers dating back to the invention of the instrument; it is notorious for increasing warmth and clarity simultaneously. Since this block is larger than a conventional sustain block it can limit upward travel of the tremolo (a fully floating setup may require some routing of the cavity). We have the block in a choice of 3 depths to suit the thickness of your guitar.