Stone Tone Jeff Loomis Signature Sustain BlockWith an increased 5 8" thickness, add even more sustain to your Floyd Rose with the Jeff Loomis signature Stone Tone Sustain Block! An added beveled edge (at Jeff's request) eliminates any dive limitations due to the block's larger size. These patented blocks are made of granite, and are designed to enhance and strengthen the sound of your tremolo equipped instrument across the entire audio spectrum. Granite, when quarried in its natural state, is not