Low-profile Press - in caps for Pozi and Phillips screws
Bifix Caps fit Pozi and Philips head screws that have a No.2 drive recess
Bifix caps are the ultimate 'Pozi' caps, that press into the drive recess of countersunk screws
Bifix caps are designed for use with flush fitted countersunk fixing
that have a No. 2 recess (the size of the recess determines the size of the screwdriver or bit uyou should be using - in this case a No, 2 driver).
A No. 2 drive recess is usually found on M3.5 to M4.3 (no6 to No8) screws
Rather than the comon 'crucifix' stem of a pozi cap, Bifix caps have been designed and moulded with the intricate 16 wing stem to achieve the best fit of any "Pozi" caps on the market.
If you look closely at the stem, you will see that some wings are bigger than others.
These wings are designed to fit into the screw recess in a certain order,
and just like any other Pozi cap, Bifix caps need to be aligned in the screw before being pushed into place.
When properly fitted, the micro-wings of the stem press against each other,
and against the walls of the screw's drive recess, achieving a grip that is greatly superior to the grip of a common pozi cap.
Brute force and/or hitting the cap with a hammer will NOT achieve a better fit.
It will however render the stem unusable and damage the top of the cap!