Eze-Lap 7/32 inch Diamond Chain Saw Sharpener with Guide. This revolutionary Diamond Sharpener with a Precision Guide will provide the user with a fail safe sharpening system that will sharpen faster and more accurately than competitive products. The EZE-LAP is the quickest, easiest and most economic sharpening system available. 1/8�� shank that can be used effectively in most sharpening devices, including any common household hand drill or Dremel Tool with an 1/8 inch collet or keyless chuck. Made in the USA.