Size: 6 X 5/8" Material: Nickel, Zinc Hardened Excellent holding power in particleboard, MDF and even plastic composites Extra-deep Phillips Recess to help minimize bit slippage One of our most popular fasteners for the furniture and cabinet industry The professional woodworkers choice - our deep thread design provides maximum holding power in a variety of different woods and man-made materials. Excellent holding power in particleboard, MDF and even plastic composites. We have added an Extra- Deep Phillips Recess to help minimize bit slippage; making this one of our most popular fasteners for the furniture and cabinet industry.