Plumb Pak 5/16 in. Square Head Furnace Key

The Plumb Pak 5/16 in. Square Head Furnace Key provides reliable operation for compatible furnace valves and shutoffs. Built with durable metal construction, this key offers the strength and dependability required for routine adjustments and heating system maintenance. Featuring a square head interface, it ensures a secure fit on valve stems to prevent slipping during operation. Ideal for residential and commercial heating applications, this key is a reliable addition to any plumbing and heating toolkit.