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The PROTO J3045B is a double-ended open end wrench designed for professional tradespeople who need reliable, precise torque on fasteners without the bulk of a box-end tool. Built from steel with a black finish, this wrench features a 15-degree head angle on both ends to improve access in tight spaces. The two wrench sizes -- 15/16 inch and 1 inch -- are machined to close tolerances, reducing fastener rounding under heavy use. Electricians, plumbers, HVAC technicians, and pipefitters keep open end wrenches like this on hand for hex-head fittings, union nuts, and service valves where a socket or adjustable wrench cannot seat properly.
This wrench is suited for both residential and commercial service work. The 15/16-inch end is commonly used on flare fittings, valve stems, and conduit locknuts. The 1-inch end handles larger hex fasteners, flange bolts, and heavy-duty union connections. Its slim profile and double-end configuration make it a compact substitute for carrying two separate wrenches on a service call. Trade professionals across mechanical, electrical, and plumbing disciplines will find this a practical addition to a service bag or tool roll.
Designed as a general-purpose open end wrench for use with standard SAE hex fasteners in mechanical, plumbing, HVAC, and electrical applications.
Open end wrenches are installed and removed by hand without special tools. Always ensure the wrench jaw is fully seated on the fastener flats before applying torque to prevent rounding. When working on pressurized systems such as refrigerant lines, gas piping, or water supply, shut off and depressurize the system before loosening or tightening any fittings. Licensed tradespeople should follow applicable codes, including IFGC, IPC, and NEC, when performing fastener work on regulated systems.
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