Hole Saw, Carbide-Tipped, 1-3/8-In. Brand_Thompson & Formby HACR listed numbers are UL

HACR listed numbers are UL for use with air conditioning

hoses for efficient dust removal

For use with all 1/4' hex shank bits

Heavy duty construction throughout

Hole Saw, Carbide-Tipped, 1-3/8-In. Brand_Thompson & Formby HACR listed numbers are ULDiablo, 1 3 8", carbide tipped hole saw, cuts both wood & metal, use on wood, nail embedded wood, plastic, aluminum, metal, cast iron, metal & stainless steel, delivers longer cutting life than bi metal for faster cutting performance & increased productivity, 2 3 8" cutting depth for 40 percent deeper holes in single pass & increased productivity, variable tooth design for faster cuts, snap lock plus mandrel system for quick & easy changes with no