Professional cores removal installer with 1/4 & 5/16 port features chromiums steel construction, delivering high torqued resistance for stubborn coppers cores removal in plumbing/HVAC maintenance. Multifunctional 4 in 1 wrench set includes 1/4", 3/8", 3/16", and 5/16" adapters, compatibles with 95% mainstream brands for precise fittings. Ideal for HVAC technicians, property maintenance, and DIYer enthusiasts requiring great tool for air conditioning repairs or bathroom fixture replacements. Engineered for wet with grip teeth and ergonomic antislip handle, perfect for rusted extraction in basements, commercial kitchens, or outdoor plumbing systems. Complete HVAC service wrench set includes 10 steel cores and hexagonal bit adapters, achieving great success rate in old faucet renovations with quick installation., Weight: 0.89728140634 pounds, Manufacturer: OOLA.DETAL