Senco SEN39A35MP DuraSpin Collated Screws Drywall to Wood Screw 3.9 x 35mm Pack 1000 Senco DuraSpin® Collated Screws for Drywall to Wood applications. Phillips No.2 drive black phosphate finish coarse thread bugle head. 50 screws per strip. CE-marked (EN145566). Suitable for both cordless and mains operated machines. Senco DuraSpin® Collated Screws for Drywall to Wood. Size: 3.9 x 35mm.