#02110 Screw Chek'R Inch System - #1 - 5/16". The Screw Chek'R identifies all machine screws, bolts, wood screws, self-tapping screws, standard size rivets and common cotter pin sizes up to 5/16" Diameter. Quickly tells you size, Threds per inch, tap drill size, clearance drill size, length and basic diameter. Cleans up dirty threads. Chrome Plate steel construction with Zip lock bag and instruction sheet.
#02120 Screw Chek'R Metric 2,0mm - 7,0mm sizes. The Metric Screw Chek'R identifies ISO metic machine screws and other metric threads corresponding to ISO standards. Quickly tells you size, Threds per inch, tap drill size, clearance drill size, length and basic diameter. Cleans up dirty threads. Chrome Plate steel with zip-lock bag and instructions.