Which is better for drilling into concrete?

The M18 Fuel set. Its drill has a hammer mode and 1,400 in-lbs of torque; the 3601-21CT is a drill/driver only and will not hammer through masonry.

Which is better for cabinet and overhead work?

The 3601-21CT. At 5.7 in long and 3.2 lbs with battery, it fits tight spaces and is easier to hold overhead than the 6.9 in Fuel drill.

Do I need the impact driver?

If you drive lots of screws, yes. The impact driver delivers 2,000 in-lbs and 3,900 RPM, well beyond the 550 in-lbs of the compact drill.

How does battery runtime compare?

The set includes two 5.0Ah batteries against one 2.0Ah battery in the 3601-21CT kit, so the set runs far longer between charges.

Is the Fuel set worth the extra cost?

Yes if you need hammer drilling, an impact driver or two large batteries. If you only drill wood and metal, the compact kit covers it for less.

Do both use the same M18 batteries?

Yes. Both run on Milwaukee M18 packs, so batteries and chargers interchange across the M18 line.

Milwaukee 3601-21CT M18 18V Compact Brushless 1/2" Drill Driver Kit vs Milwaukee M18 Fuel Hammer Drill and Impact Driver Set – Gen 4 (3696-22/3697-22)

Buy the 3696-22/3697-22 set if you need hammer drilling into masonry or heavy fastening. Buy the 3601-21CT if you want one light drill for wood, metal and screws. The set costs more because it includes two tools, two 5.0Ah batteries and a hammer function; the 3601-21CT kit ships with one 2.0Ah battery.

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