Yellow Passivated with a Countersunk Pozi Head|No Splitting or bulging in MDF material when turning into thin or narrow surfaces.|The screw's geometry aloows MDF boards and thin chipboard to be screwed together without pre-drilling.|The specially designed CUT point ensures high sccuracy in fastening.|The slender, countersunk head with cutting ribs easily penetrates into the material.|No splitting, No buldging in the material, High accurate fastening with special CUT point|No - Pre-drilling.