The Phillips Screw Company is the proud inventor of both the Phillips (PH) and Pozidriv® (PZ) cruciform recesses that are used in a huge proportion of screws sold today all over the world.
The POZISQUARE® Drive (PSD®) fastener system is the latest iteration of the cruciform recess from the Phillips Screw Company. This represents a major step forward in screw user-friendliness. We call this connection between recess and driver bit "Stick-Fit®".
All Phillips products with a PSD® recess come with a high-quality driver bit included in the box. When the screw is engaged on to the bit it locks on using a mechanical fix. This fixing keeps the screw attached to the driver bit as if magnetised.
As the screw does not need to be held during installation the user has a free hand to exactly position the component being fixed. This game-changing approach means that once professional installers and DIY'ers have tried Stick-Fit® screws very few will return to traditional types of fixings.
The PSD® driver bit also includes Phillips ACR® ribs which enhance driving torque capability and reduce cam-out.
PSD® recesses are also backwards compatible with Phillips and Pozi driver bits. This means that if a user were to lose the PSD® driver bit, screws can still be inserted and removed using the equivalent sized PH or PZ driver bit (note: Stick-Fit® will not be achieved when using PH or PZ driver bits).