Which is better for changing car and truck lug nuts?

The DCF891B. Its 800 ft-lbs breakaway and 1/2-inch drive cover most passenger and light truck lug nuts, and it weighs less than half as much.

Do I need the DCF964B for heavy equipment?

If you remove large bolts on excavators, tractors or structural steel, yes. Its 1,900 ft-lbs breakaway and 3/4-inch drive are built for that class of fastener.

Is the DCF964B worth the extra $128?

Only if your work needs more than 800 ft-lbs of breakaway torque or 3/4-inch sockets. For general repair, the DCF891B does the job for less.

Both use brushless motors and hog ring anvils. The DCF964B is built for heavier loads, but running the DCF891B within its torque range should give it a long life.

What else do I need to buy?

The DCF891B includes a 1 Ah battery but no charger. The DCF964B is tool only, so you need a 20V MAX battery and charger if you do not own them.

Which has better control?

The DCF891B has 4 speed settings and a variable trigger. The DCF964B has 3 speeds plus a 4-mode selector and Precision Wrench mode, which gives more control on heavy fasteners.

DeWalt DCF891B 20V Cordless 1/2" Impact Wrench (Tool Only) vs DEWALT 20V MAX XR Brushless 3/4 in High Torque Impact Wrench with Hog Ring (DCF964B)

Buy the DCF891B for general auto, truck and shop work: it is lighter, cheaper and its 1/2-inch drive fits the sockets most people own. Buy the DCF964B only if you regularly break loose large bolts on heavy equipment or structural steel, where its 1,900 ft-lbs of breakaway torque and 3/4-inch drive matter. As of November 3, 2026, the DCF891B is $172.31 at Walmart and the DCF964B is $299.95 at Amazon, a gap of about $128.

Today the DeWalt DCF891B 20V Cordless 1/2" Impact Wrench (Tool Only) costs $127.64 less at its best price.

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