The Ullman Precision Product Hand Checkering Tool cutters are perfect for getting you into and out of tight spots leaving only sharp even diamonds as an end products. They help eliminate nasty overruns in those hard to reach corners. The 3/16" cutter is also used by many as their cutter of choice for bringing diamonds to point. The long 5/8" cutter with its large 2" radius, it outshines all others for the perfect start to an excellent checking job. The 3/8" length is the optimal size for keeping straight lines and creating crisp diamonds over a majority of the pattern. It has a 20 degree ground on the front and rear of the cutter giving you a clear view. This helps to eliminate overruns as well. One push and one pull tool of each size makes any checkering kit complete.