Identify Screws Instantly with the Screw Chek'r
This ingenious, threaded gauge quickly tells you size, threads per inch, tap drill size, clearance drill size, length and basic diameter. Even straightens bent screws and cleans up rusty or battered threads. Made of heavy gauge, satin chrome plated steel. Instructions included.
Inch Screw Chek'r for American and Unified screws from no. 1 through 5/16 inch. Also identifies wood screws, sheet metal screws, rivets, cotter pins.