How do I know what size screwdriver to buy?

Choose the bit size that fills the screw head entirely. A bit that is too big or too small will not seat properly, and you’ll end up with a stripped screw.

Why is it essential to use the correct size screwdriver?

Select the proper size screwdriver for the screw, so that the thickness of the blade makes a good fit in the slot. This not only prevents the screw slot and blade from being damaged, but reduces the force required to keep the tool in the screw head.

What may happen if you use the wrong sized too big or too small screwdriver?

When the blade is too big — it simply won’t fit into the slot. “If the tip is too small, then its sides won’t fully rest against the sides of the screw slot,” Wagner said.

Why are flat head screws still used?

The slotted head screw (commonly but incorrectly called a flat head) is the oldest type of screw in use today. Now, they are mostly used for decorative purposes and have less “impact”. Many people think they are used on light switch covers still for this reason.

What should you never do with a screwdriver?

Do not use a screwdriver as a punch, wedge, pinch bar or pry. Keep the tip clean and sharp to permit a solid grip on the tip of the screw. Keep the handle of the screwdriver clean and intact to allow for a solid grip. Never hold the piece you are working on in your hand.

How do you choose the correct screwdriver for the job?

Always match the screwdriver to the screw head, both in terms of size and type. Choose contoured handles that fit the shank tightly, with a flange to keep the hand from slipping off the tool. Use a slot screwdriver with a blade tip width that is the same as the width of slotted screw head.

When should you use a screw instead of a nail?

While screws are better fasteners when grip strength is needed and nails the best fastener for when shear strength is needed, either one will work in most situations. Even seasoned builders will use screws when a nail would have been better simply because it’s easier to remove a screw in case of a mess-up.

What happened to screw if you over-tighten them with a screwdriver?

Screws can become stripped if you over-tighten them with a screwdriver. A stripped screw, as shown in Figure 2, may get stuck in the screw hole, or it may not tighten firmly.

Should I get a ratcheting screwdriver?

The best all-around screwdriver for the toolbox or kitchen drawer should be a ratcheting, multi-bit screwdriver with easily accessible bit storage. Ratcheting: Ratcheting screwdrivers are faster and easier to use than regular screwdrivers.