#14-1.5" Ulitmate Metal-to-Wood screw with 5/16" fully enveloping head, warranted against red rust for the life of the roof. Available in multiple colors. Made for replacing existing screws.
 
250 screws per bag. 
 
Lifetime Warranty fully enveloping head and sealing washer
Deep thread form for maximum pullout resistance
The sealing washer is non-conductive EPDM rubber