Screwdrivers
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Frequently asked questions
Can Phillips (PH) and Pozidriv (PZ) be used interchangeably?
It is not advisable. PZ has four extra ribs between the wings and a different wing angle, so a PH bit in a PZ screw, or the reverse, makes point contact, cams out and damages the head. PZ screws usually show four small tick marks between the cross slots.
What does 1.0 x 5.5 on a slotted screwdriver mean?
It is blade thickness 1.0 mm and blade width 5.5 mm to ISO 2380. The tip should fill the screw slot in both thickness and width; a blade thinner than the slot twists at the edge and breaks out the screw head.
How do Torx (T) and Torx Plus (IP) differ?
Torx Plus has squarer lobes for better torque transfer and less bit wear, and is common on automotive and electronics equipment. A standard Torx bit will turn a Torx Plus screw without full engagement, but a Torx Plus bit will not fit a standard Torx screw.
When is a through-tang screwdriver needed?
A shaft that runs through to the end of the handle can be struck with a hammer to free rusted screws or clear a slot. Ordinary plastic-handled drivers lack a full tang, and hammering cracks the handle and loosens the blade.
When should a screwdriver be reground or replaced?
A slotted tip with rounded edges or a Phillips tip with worn wings slips out of the recess and damages the screw head. Slotted tips can be reground flat and square if the blade thickness stays correct, while worn Phillips, Pozidriv or Torx tips should be replaced. When grinding, avoid heating the tip until it changes color, since the steel loses hardness.
What are the pros and cons of magnetic screwdriver tips?
A magnetic tip holds the screw when reaching into deep holes or working one-handed, and fewer screws fall into the machine. The downside is that it attracts steel chips and should not be used near magnetically sensitive parts. A magnetizer and demagnetizer block can switch magnetism on or off as needed.
Which screwdriver handle should I choose?
A larger handle diameter gives more torque for the same hand force, which suits large screws. Two-component handles with a soft layer grip better when hands are oily. Handles should carry a color code or tip symbol so the right tool is picked quickly.
What is the benefit of a hex bolster screwdriver?
A hex section on the shank or at the handle neck lets you add a wrench when more torque is needed than hand force gives. This frees stuck screws without a hammer and keeps the turning force more evenly on axis.
