Filpin Twist Drills .60mm 5/BxDurable construction Aids pins as they are inserted into the prep Avoids displacing the dentin Lowered risk of craze lines Filhol Dental Filpin Drills are specially engineered instruments that facilitate the precise and steady insertion of pins into the preparation. These universal sized drills, with a diameter of 0. 60 mm, prevent dentinal displacement and minimize crazing.