THIS IS A NEW JACOBS CHUCK 65130DIN 371 CLUTCH TAP COLLET SYSTEM 2, TAP SIZE M5 WITH 6.0MM TAP SHANK 4.9MM DRIVE SQUARE.THE FIRST PICTURE IS A STOCK PHOTO AND THE REST OF THE PHOTOS ARE OF THE ACTUAL UNIT.THE BROWN MARKS PERHAPS SHOWING ON THE TRUE PICTURES ARE THE FACTORY SEALED LUBRICANT.I HAVE SEVERAL OTHERS OF DIFFERENT SIZES SO CHECK THE REST OF MY LISTINGS. THIS IS THE LOWEST PRICE TO BE FOUND.