less common than Phillips"
Most screws now are Posi. They appear to have taken over the market.
The Posi-drive screw
Jan 16, 2008
89 Replies
Probably Merkin since it doesn't mention GKN.
They were a great advance on Phillips since day one.
In message , Doctor Drivel writes
Ceilidh band, actually
There are (or could be!) some very interesting alternatives:
Please eff off as you are a plantpot.
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> Says
Please eff off as you are a plantpot.
Cor! Maxie, you are a one.
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Well of course a screwdriver must have a laser. How else are you going to align the screwdrivers tip with the head of the screw?
A few comments to save splattering replies everywhere.
Phillips screws were invented by the yanks and they are purposely designed to cam out - they were widely used in mass production / industry as a means of torque limiting. What is a purpose designed feature has become in many eyes as a design flaw.
Posidriv was also invented by the yanks - the patent along with that for Phillips screws is online and a simple search will find it, GKN have the rights outside the USA.
Supadriv was a GKN only refinement in the late 70's/early 80's
the cross hole?
Concur - Philips and pozi are completely useless The only screw that is any good is the Winzer Wurth torq head. Goes in any any angle, no jumping off/out by the screw tip. Brilliant.
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