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Use a Hammer Drill
In some less dense materials like soft brick, you can drill pilot holes using a carbide-tipped bit in a regular drill. But in most cases, you’ll need a hammer drill. Corded hammer drills cost $65 to $400, or you can buy a cordless model starting at $230. You can also rent hammer drills for about $35 per day.
Precisely sized carbide-tipped bits are often included with packs of screws, or you can purchase one separately ($4.50). Match the bit to the size screw you’re using: 5/32-in. bit for 3/16-in. screws and 3/16-in. diameter bit for 1/4-in. Keep a spare bit on hand, since the tip can wear out rapidly in some hard materials, resulting in a hole that’s too small. One indication of a worn bit is screws that are difficult or impossible to drive completely.
Click image to enlarge.
Install the correct bit in your drill. Set the drill to “hammer” mode and drill the hole using moderate pressure. Blow or brush the dust from around the hole before you withdraw the bit.
Use Hex Head Screws Where Appearance Isn’t an Issue
Concrete screws are available with either flat head Phillips or hex heads. In situations where the screwhead must be flush to the surface (furring strips under drywall), or where a Phillips head would look nicer, use the Phillips head screws. Otherwise, always pick the hex head screws. The positive engagement of the hex bit makes them easier to drive. You’ll need a 1/4-in. hex driver for the 3/16-in. screws and a 5/16-in. hex head driver for the thicker 1/4-in. screws.
When you’re using Phillips head screws, keep extra No. 2 (No. 3 for 1/4-in. screws) Phillips head bits on hand. The hardened screws wear out bits quickly.
Drive Phillips head screws where a flush surface is required and where a Phillips head would look better. Otherwise use hex head screws.
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