The #368 Premium Large Diamond Football Burr is 2.3mm in diameter. It has a unique football shape which makes it great for carving leaves and fish scales. This ParaPoint can also be used on eggshell. For a smaller Football Diamond Burr, try the 368-016(#368 Premium Diamond Small Football Burr). It is excellent for rounding and smoothing unfinished edges in relief carving. It is also good for detail work.