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A good screw gun has following features:
Comfortability: A screw gun must be easy to hold onto. The thickness and angle of their handles seemed just right. Especially the cushioned rubber grips are really the favorites of the one using it
Noise: Screw guns running full blast can be very loud and irritating. The new screw guns are all a lot quieter, and their noise levels are quite tolerable.
Switches: Screw guns commonly are used in locked-on, full-speed mode, so a lock-on switch's ease of use is an important issue. A good one lets you relax your fingers.
Depth adjustment and bit replacement: The only thing required to be done with a screw gun is to attach it to drywall. The depth adjustments on most models are easy to use. Just slightly turn the end of the nosepiece and it is all set.
Variable speed: If a screw gun is exclusively used for installing drywall, you might think it doesn't need a variable-speed switch. It's cheaper to manufacture a tool with a single-speed switch, but equipping a drywall screw gun with variable speeds gives it a soft-start feature that can increase the motor's life.
Belt clip: Some belt clips are removable. Remove their clips, and the tools get within 1/2-inch of a corner like the rest of the screw guns we tested.
Ways to use screw gun
A drywall screw gun sets screws' bugle heads just below the drywall paper surface. The tools' positive clutches engage when pressure is applied to the Phillips bit and release when the pressure releases. You can adjust the screw bit depth and how deep it sets screws. As a drywall screw gun sets each screw to the correct depth adjustment, the screw pulls the panel tight against the framing as pressure from the nosepiece pushes against the drywall. The screw head spins against the paper as it sinks, leaving a slight dimple and a clean, smooth edge around the head. When the screw reaches its proper depth, the clutch disengages. To use a drywall screw gun properly, hold the tool firmly as you drive each screw. That way, your hand and forearm absorb most of the stress. Your wrist should almost align with the nosepiece, and your thumb, index, and middle fingers ride along either side of the motor housing. Pull the trigger and push the tool forward with a punching motion. That engages the clutch, starts the screw rotating, sinks it, and disengages the clutch in a fraction of a second. If you don't maintain pressure on the drywall screw gun after engaging the clutch, the screw won't set properly.
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