These are wood screws with:
- Pan Head : semi-elliptical top surface with flat bearing surface.
- Original Robertson® square drive
- Lo-Root® Thread
- Aster® Thread Feature
Lo-Root® Threading provides a single lead deep thread with a wide spacing for superior holding in softwoods and particle boards.
Aster® Thread Feature is now standard on all Lo-Root® screws with a serrated tooth thread design, providing quicker starting, reduced splitting and less drive torque.
It is recommend to use only Original Robertson® bits together with Robertson® screws for a true "Cling Fit" that provides maximum recess penetration, holding power and driving performance.