If you're looking at the M12 lineup and wondering which impact with an anvil you should put to the top of the list, it should be this one for sure.  It has the most output of any of the M12 impacts coming in at 250 ft-lbs of breakaway torque and is a great addition if you're using it with the right angle impacts. It has 4 drive modes so you can control your torque settings with an auto-shut-off mode to prevent over tightening. Specifications: Model Numbers:  2554-22 (2554-20 Tool Only) Breakaway Torque: 250 ft-lbs RPM: 0 - 2,700 Length: 4.8" Weight: 2.4 lbs. Kit Includes: M12 FUEL™ 3/8" Stubby Impact Wrench M12™ REDLITHIUM™ CP2.0 Battery  M12™ REDLITHIUM™ XC 4.0 Extended Capacity Battery Pack  M12™ Lithium-ion Battery Charger  Belt Clip Carrying Case Milwaukee Tools do not qualify for 10% Hex Plus discounts. However, Milwaukee does qualify for Hex Plus free shipping. ***ALL SALES ARE FINAL ON DISCONTINUED ITEMS, NO RETURNS