Does the 2659-20 come with a battery and charger?

No. It is a bare tool: the box has the wrench and a belt clip only. You need an M18 battery and charger, which you may already own if you use Milwaukee tools.

How much torque does it have?

Milwaukee rates it at 183 ft-lbs of fastening torque, with 2,450 RPM and 3,350 IPM. That is strong for a compact 1/2-inch wrench but below full-size high-torque models.

What is a pin-detent anvil?

The anvil has a pin that locks through a hole in the socket to keep it from falling off. Retention is very secure, but changing sockets takes an extra step compared with a friction ring.

Will it remove lug nuts?

Yes, for most passenger cars and light trucks it has enough torque to break lug nuts loose, especially with a charged high-capacity M18 battery. Very tight or rusted fasteners may need a breaker bar or a high-torque wrench.

Which batteries work with it?

It runs on any Milwaukee M18 battery. A larger pack gives more runtime and slightly better performance on hard fastening jobs.

How does it compare with the M18 high-torque impact wrench?

The high-torque model delivers far more torque for heavy truck and stubborn fasteners but is bigger and heavier. The 2659-20 trades top torque for a compact body that fits where the big wrench will not.