1. Never use a screwdriver as a leverage tool.
2. Never use a screwdriver as a punch tool, being struck with a hammer. Using a screwdriver as a chisel or punch may cause the tip to break and fly, hitting the user or other person.
3. Use the correct size tip for the size of screw head and if the screwdriver tip has rounded edges, redress with a file. This will help prevent the tool from slipping. If the tip is too wide it will scar the workpiece around the screwhead.
4. Don't use a screwdriver near a live wire or for electrical testing unless fully insulated or made for that purpose. Even when using an insulated screwdriver for electrical work, always disconnect the current before working.
5. Never expose a screwdriver to excessive heat.
6. Always drill a pilot hole when driving screws. The wood will split if you drive a screw too close to the end of the workpiece without drilling a pilot hole.
7. A little wax/candle grease/soap on the thread of a screw will help the screw turn easily.

Choosing a Screwdriver

1. Handle - A moulded plastic/shaped handle such as High Grip or cabinet pattern are ideal for woodscrews and high torque usage.
2. Blade Length - Use the longest blade convenient for the work being carried out. More power can be applied to a long screwdriver because a longer screwdriver has a larger handle.
3. Tip Type
   • Use a flared tip for normal and heavy duty work.
   • Use a parallel tip for lighter work, where the screwdriver is hidden below the surface of the workpiece, eg. counterbore, and contact screws in plugs, switches etc.
   • Only use Phillips/Crosspoint screwdriver on Phillips screws, or Pozidriv/Supadriv screwdrivers on pozidriv/supadriv screws.

Screw Size	3-4	5-10	12-14	16+
Tip No.	1	2	3	4

No. 0 tip is also available for small electrical component screws.