Spax Xpert Wood Screw & Raw Plug Case - 847 Assorted Screws and Organiser Box SPAX Xpert Wood Screws & Raw Plug Case. Pack of 847. The SPAX Xpert range of screws are a great range of countersunk wood screws. Contains 847 assorted screws and plugs in a polycarbonate case. SPAX patented technology and serrated edges gives you hassle free screwing.