a diagram showing the bottom 104 rotated around the fastener 108 in the direction shown by arrow 103 fig6 is a diagram showing another view of the bottom 104 rotated to the same position with respect to the top 102 as shown in fig5 fig7 is a diagram showing a different view of the apparatus 100 with the top 102 and the bottom 104 in the same relative positions as in fig5 and 6 fig7 shows the opening 114 through which hairs are inserted and also shows the surface 111 of the area 110 on which the tips of the hairs rest the area 110 is defined by a curved wall 113 which in a closed position of the apparatus 100 accommodates hairs or fibers inserted through the opening 114 in one embodiment the opening 110 as defined by the curved wall 113 is larger than the through hole defined by the opening 114 in the top 102 and is aligned approximately coaxially with the through hole defined by the opening 114 in the top 102 fig8 is another view of the apparatus 100 with the top 102 and the bottom 104 in the same relative positions as in fig5 and 6 fig8 shows a different view of the area 110 and the curved wall 113 fig9 is another view of the apparatus 100 with the top 102 and the bottom 104 in the same relative positions as in fig5 and 6 fig9 shows the protruding edges 106 and.