8.0 x 100mm Pozi Csk Frame Fixings. Box 100. 8mm hole required; 60mm max fixing thickness; 45mm min hole depth. Nylon plug with a Zinc Plated screw for fixing into Concrete, Masonry, Stone or Brickwork. Use for Door & Window Frames; Wall Plates; Battens. Countersunk head allows a flush finish.