CEN-TECH / 6" Digital Caliper /All Stainless Steel Frame with Precision Ground Jaws. Direct:0-6" and 0 to 150.0 mm reading . Accuracy : .001" / 0.02 mm . Includes two 1.5 V button cell batteries . Inch to Metric Button . On/Off Button . A MUST HAVE FOR ROD BUILDING . This is the perfect tool at a great price for getting all your measurements right on!