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The FLEX FX1451-Z is a 24V brushless 1/2-inch mid-torque impact wrench sold as a bare tool. It delivers 650 ft-lbs of fastening torque and 900 ft-lbs of breakaway torque with no ramp-up, and FLEX claims up to 50 1/2-inch bolts tightened per charge on a 5.0Ah battery. A variable-speed trigger with four modes, dual LED lights and a hog-ring anvil round out the package. It sits in the crowded mid-torque class against the Milwaukee M18 Fuel and DeWalt 20V Max mid-torque wrenches, which offer similar breakaway figures but are sold in their own battery ecosystems. It suits mechanics and contractors already on the FLEX 24V platform who want lug-nut and suspension-bolt capability without a high-torque, heavy-bodied tool.
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Owner feedback on the FX1451-Z centers on strong breakaway torque for its size and good runtime on the 5.0Ah pack. Some note the bare-tool packaging adds cost if you are not already on the FLEX platform.
The FLEX 24V Brushless 1/2" Mid-Torque Impact Wrench (FX1451-Z) is a cordless impact wrench for automotive and heavy-duty fastening. It delivers 650 ft-lbs of fastening torque and 900 ft-lbs of breakaway torque with zero ramp-up time. This is the bare tool, so the battery is sold separately.
A brushless motor drives the tool. A variable speed trigger and 4 mode settings give control over the work. Two LED worklights light the work area. The handle has a rubber grip to reduce fatigue, and the compact design helps in tight spaces.
The 1/2-inch square anvil has hog ring retention. With a 5.0Ah lithium-ion battery, the wrench tightens up to 50 1/2-inch bolts on a single charge. It is part of the FLEX 24V system and works with all FLEX 24V tools and batteries. The FLEX Advantage gives 20% more power with 24V lithium, 25% longer runtime with THERMA-TECH™, and up to 50% faster charging.
