Multi-Gauge-Imperial-Sealey-MGI1-Stainless-steel-multifunction-thread-pitch-identification-gauge-Easily-identify-the-size-of-bolt-drill-bit-or-tap-that-is-required-Check-the-thickness-of-washers-&-diameter-of-electric-wire-Use-as-a-set-square-&-ruler-Sealey-MGI1-Multi-Gauge-Imperial