Wall Mount Thread Checker Gauge

Used to size metric nuts or bolts. Has actual steel fasteners in the gauge for sizing the different diameter nuts and bolts. Check male and female threads 6-32 to 9/16" (UNC & UNF) coarse, medium and fine thread. Check male and female threads 4m to 12mm, various thread pitches. Handy ruler in inch and metric lengths. Check screw sizes from #0 to #14. 39" H x 3" W