High-intensity quartz fiber post has a special drill to make an exact match with the fiber resin post Quartz， Screw Thread QuartzMaterial:GlassSize: 2.9cmColor: SilverNet Weight :8gPackage Weight :18 gPackage included: 1 Box Dental High-intensity Fiber Resin Post with 4 Drills Screw Thread Quartz Drills012 5 pieces014 5 pieces016 5 pieces018 5 piecesDrills 4 pieces Have a nice day!