Catalog no. : 011.653.18 to 011.653.70 Thread Diameter : 3.9mm Core Diameter : 2.7mm Use drills Diameter : .2mm For passing hole : 4.0mm Material : Stainless steel 316L,316LVM ,Titanium Size ; 3.9mm Length : 18mm to 50mm (Diff. 2.0mm) Length : 55mm to 70mm (Diff. 5.0mm)