How to Distinguish Between Fastener Drivers and Finishes by HighPoint

PH
Phillips Drive

The most common drive for wood application fasteners

CO
Combination Square / Phillips Drive

Designed to be driven with a Combo or Square Drive bit to provide better engagement and reduction of 'cam-out' while driving. A Phillips Drive bit cannot be used for installation, and could be used for removal if a Square or Combo bit is not available

SQ
Square Drive

Provides better engagement and reduction of bit 'cam-out' while driving.

PZ
Pozi Drive

Designed to provide higher torque in hand driving applications.

PH-SL
Phillips-Slotted

combination Phillips and Slotted Drive found primarily on Truss Head Machine Screws. A Phillips bit is recommended for driving. A Slotted Drive bit is recommended only for removal.

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