On October 11, 2017 at 10:10, SB Smarthomes said...
If your just drilling through framing (not finish work), you can drill the larger size hole through a scrap piece of lumber and then screw or clamp this piece over your existing hole to use as a guide.
1/2" or 5/8" plywood is ideal because you can easily screw through it to secure to the lumber that has the hole that needs to be enlarged.
+1
Less of a chance of ripping your arm off too