Just an amateur so I didn't want to spend a lot of money on a collet and found these. Not many reviews but it looked the same as the other one on Revain so I took a chance. It arrived in good condition and after inspection the editing was well done. The filaments were a bit "crispy" but a quick cleaning and that was gone. It has less wear than my 3-jaw chuck and is much more stable when I need to remove a part and then put it back in the chuck to get better concentricity.