The Model 4900 uses the same Eubanks blades as the Model 7400. Strip lengths range from 1/32 x 1/32 to 2, 1/2 x 2, 1/2 (0.8mm x 0.8mm to 64 x 64mm). In other words, it covers most wire prep requirements. A compact tool is used to load the blades into the 4900. No calibration is required with blade change.