Our 6 piece coin set combines all the necessary accessories to create unique keepsakes, coin holders for collectors or anything you can think of when it comes to coin inlays. Inlay a coin on the bottom of any of your projects to create a unique signature dating. The six forstner bits are comprised of high speed steel for excellent performance. Each forstner bit in this 6 PC set is clearly marked with: penny, nickel, dime, quarter, half dollar, and dollar respectively for easy identification. Also available is a depth stop kit for your forstner bit coin set. This set comes with an adjustable depth stop collar that doesn't require any clips or pins, which makes it very easy to change bits and more importantly bit depth. The depth stop ring is adjusted with a simple counter clockwise turn of the hex key wrench (included). Ball bearings in the depth stop let the forstner bit spin while the stop rest's on the stock without marking or burning the wood. This set includes forstner bits for penny, nickel, dime, quarter, half dollar and dollar.