Empire True Blue 16 In. English Heavy-Duty Professional Combination Square Boxes & Covers Used only for exhaust fan

Used only for exhaust fan applications providing good airflow and easy connect ability

Permanent On Most Hard To Mark Surfaces Such As Glass

Aggressive tooth design for fast cutting

as directed by manufacturer

National Hardware Extra Heavy T-Hinges are made with offset holes for heavy-duty strength to prevent wood stripping on your application

Empire True Blue 16 In. English Heavy-Duty Professional Combination Square Boxes & Covers Used only for exhaust fanPrecision machined head and True Blue vials ensure accuracy and squareness to 0. 001 In. (inch). Etched stainless steel blade with inch graduations. Heavy duty machined square head. Self aligning drawbolt, hardened scriber.