Description: Metal screw checker measures #1 (.073") thru 5/16" (.312") diameter screw sizes. Measures lengths up to 3". Indicates tap series, threads per inch, and clearance drill and tap drill size...More Details »
Description: Metal screw checker measures 2.0mm (.079") thru 7.0mm (.276") diameter screw sizes. Measures lengths up to 60.0mm (2.36"). Indicates tap series, threads per inch, and clearance drill and tap...More Details »
Description: Heavy plastic screw checker measures #1 (.073") thru 5/16" (.312") diameter screw sizes. Measures lengths up to 3". Indicates tap series, threads per inch, and clearance drill and tap drill size...More Details »