If you sharpen things, you need this.You can let your stone slip-slide every which way, or you can keep it steadily in place while you sharpen, making the whole experience happy and safe.

This sink bridge is a serious upgrade from the usual stone-holder, allowing for an easy source of water and an easy destination for the mess of sharpening.  It adjusts to most sizes of sink, and the grips adjust to hold any size of stone.