• Front side measures American Standard   
  wood screw No. 0 to  No.30 at one edge,  
  wire and screw diameters from 1/16" to 
  7/16" on opposite edge.
• Reverse Wire gage (BWG) from 17 to 0000 
  on one edge. New Standard or American 
  Wire gage (AWG) from 15 to 0000 on the opposite edge.
• Also includes 3" rule measuring screw lengths.
• Measures 4"x 1-3/8"
• Made of stainless steel.