1. Stop Fighting Your Floating Tremelo - These Graded Blocks Can Help You Set Up a Rocker Bridge or Style Floating Tremelo in Less Than 10 Minutes 2. Quick and easy - as you adjust and set up the floating tremolo, these blocks turn it into a hardtail, and once everything is set up correctly, it drop out and become a true floating tremolo 3. four sizes to fit almost all floating configurations 4.Solid Mahogany Rocking Bridge Floating Tremolo Pad-Tremolo Wedge (Luthier Set 1/4inch-3/4inch) Colour:dark wood color Material:Mahogany Package Contents: 4 x Guitar Bridge Blocks Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.