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The CHANNELLOCK INC 412 is a 6.5-inch V-jaw tongue and groove plier built for trade professionals who need a reliable grip on round stock, tubing, and fittings. The V-jaw profile creates more points of contact on round workpieces compared to a standard flat jaw, reducing slippage and improving torque transfer. Laser heat-treated teeth maintain their bite through repeated use. The undercut tongue and groove channel design locks the jaw position securely so the adjustment won't walk under load. A Permalock fastener replaces the traditional nut-and-bolt pivot, eliminating a common failure point on heavy-use tools. The reinforced edge minimizes stress fracture at the pivot area.
The 412 is suited for plumbing rough-in and service work, HVAC copper and PVC connections, and general mechanical applications where a compact, adjustable plier is needed. At 6.5 inches overall length with five jaw adjustment positions and a maximum jaw capacity of 0.87 inches, it fits comfortably in tight spaces such as under-sink valve work, condensate pan fittings, and small-diameter pipe connections. Plumbers, HVAC technicians, and general maintenance technicians commonly carry this size as a secondary hand tool for finish and service calls.
Designed as a general-purpose adjustable plier for residential and light commercial plumbing, HVAC, and mechanical service applications requiring a 6.5-inch tongue and groove tool.
Licensed plumbers and HVAC technicians are the primary users of tongue and groove pliers on service calls. When working on pressurized lines, shut off the water supply or refrigerant isolation valves and relieve system pressure before applying the tool to fittings or connections. Avoid using pliers as a substitute for the correct pipe wrench or fitting wrench on soft materials such as brass valve stems, as jaw teeth can deform the fitting surface. Inspect the Permalock pivot and jaw channels periodically for wear or debris that could affect adjustment holding.
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