Replicate the finger board radiuses of all types of iconic guitars including vintage and modern Fender starts, vintage and modern Gibson's and many others. This set include 6 radiusing bits with the following radiuses: 7-1/4 in., 8-1/2 in., 9-1/2 in, 10 in., 12 in. and 16 in. These bits can accommodate fretboards up to 3-3/4 in. W. The bits feature C3 premium micro grain carbide blades and a 1/2 in. shanks. A unique way to add a radius to your stringed instrument's fretboard. These radiusing bits will eliminate the excessive effort required for using a sanding block. Tape the finger board to a perfectly squared board and slide along the router table fence with the top of the bit's blade running at the height of the center line of the finger board. This will radius 1 half of the board. Then flip the stock to radius the other half. Yonico fretboard radiusing router bits come in radiuses of 7-1/4 in., 8-1/2 in., 9-1/2 in., 10 in., 12 in. and 16 in.