http://www.ultimategarage.com/spax.htmlMDF Screws
MDF/Edge Arrow Point Partial Thread Screw - specifically engineered for MDF. No pre-drilling necessary. Slender head with the ribbed underside easily countersinks into the material. Silver zinc finish. These fasteners are currently being changed by Spax from pozidrive to torx drive. The appropriate drive bit (mfg by Festool / Wiha) is included by Ultimate Garage with the sale of each box of screws.