Multi (function) Mount: This unique and convenient abument is desinged for two different usages. -Mount for fixture placement -Abutment for final restoration.(Cement Screw type) Pre-mounted or Free-mounted? EZ Plus is provided as two different package. Select appropariate one as a matter of convenience. MF (Mount-Free type): Fixture and Cover screw. PM (Pre-mounted type): Fixture with Multi-mount and cover screw. 1mm of trimmable margin height Gives you restorative flexibility.