BRITE MARK® 40 Threaded Cap Barrel Permanent Paint Marker, Blue, Medium no checkout Single flute cutting edge for greater Single flute cutting edge for greater control through steps Hex shank prevents slipping in drill chuck Also available with (TiN) coating for longer life New SpeedPoint tip penetrates faster than previous Unibits and prevents walking Ideal for drilling holes into thin materials such as stainless steel 8 mm diameter x 120 mm length refills or losing opacity Valve action mechanism prevents paint in barrel from drying when cap is left off Bullet tips are replaceable to assure complete use of paint in each marker Heavy duty aluminum body with large paint capacity General purpose felt tip paint markers that write on virtually any surface Quick drying