Round Washer Head Screws --The round washer head design could possibly be the most versatile head design available. It combines the advantages of the pan head but has a washer built on to the head to increase head diameter and prevent overdriving in softwoods while providing a maximum bearing surface. These fasteners come with our patented Recex® Square-Phillips combo recess drive designed to offer the dependability of a square drive recess with the convenience and after-market serviceability of a Phillips drive. In addition, they have our patented Lo Root® deep thread designfor superior holding power while reducing splitting or crumbling of the material. For added protection from wood splitting, we also offer them with a type 17 cutter point.