Overview Reviews Product Description Tapered edge for gauging spark plugs. Specially designed hole with flange adjusts side wire of plug without pressuring center electrode. Lisle Tools Catalog Product Videos Custom Field Harmonization code HTS #9031809090 Manufacturing country CN Product Reviews Write a Review Write a Review × Lisle Spark Plug Gauge & Gapper 67870 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *