5 SIMPLE TECHNIQUES FOR KINDS OF SCREW HEADS

Quadrex- Quadrex screw drives are a far more special drive when compared to many of the options accessible. This travel type is a combination of Phillips drives and square recess drives. They may be put in and taken out with a standard Robertson, Phillips Instrument, or maybe a quadrex Software.A Robertson screw, also called a square[38] or Scr