Miniature self-tapping bone screwsUsed extensively to anchor dental cement to bone, these self-tapping screws have been found to have superior holding strength over ordinary machine screws. Made of stainless steel, with fillister flat head. Package of 100 screw 4.0 mm long, shaft diameter of 0.85 mm Use our 0.7 mm burr, No. 19007-07 to pre-drill for these screws .No. 19010-10 origine catalogue FST