Even if you never rout a bowl or tray, you can still get lots of work from these bits. Everybody needs a cutting board, for example, and these bits rout a groove that's perfect for catching meat juice and drippings. Or use them to rout beautiful raised sign lettering, unique boxes, or lots of other specialty or craft items. The round corner of the bit shapes the inner radius while the sides and bottom create the smooth flat surfaces. For best results on jobs where accuracy is a priority, we recommend using our top bearing bowl and tray bits.D = Diameter; CD = Cutting Depth; CL = Cutting Length; R = Radius; SH = Shank Diameter; OL = Overall Length.