Instructables

Step 16: Phillips Square-Driv®

Picture of Phillips Square-Driv®
211 phillips square-driv bit.jpg
A combination drive designed by marrying the classic Phillips cruciform recess and the popular square drive recess. The result is a highly efficient and functional multi-driver servicable recess.

Advantages and Disadvantages of Phillips Square Drive

This drive system has an increased driver bit cross-section significantly increases the longevity of the driver bit, reducing overall tool costs. Combines positive characteristics of both the Phillips and the Square Drive with few negative characteristics. Not as prone to camout; higher torques than either original drive. Screw damage is minimiied and drive tool life is extended. In addition, there is a consistent stick between the driver and the screw, making hard to reach joints a simple task.
 
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