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. Both models have a 1/8? shank that can be used effectively in most sharpening devices, including any common household hand drill. Model CSR shank is also threaded for use in some specialty devices.