€¢ Adjustable in 1/2 inch increments €¢ Pre-drilled screw/nail and staple holes €¢ Numbered slots for fast; accurate clip insertion; countersunk nail and screw holes €¢ Full finish coverage to deter corrosion >> Adjustable in 1/2 inch increments. Pre-drilled screw/nail and staple holes. Numbered slots for fast; accurate clip insertion; countersunk nail and screw holes. Full finish coverage to deter corrosion."