Smooth contour provides aerodynamic flight while extending target life. Extra-deep tapered hole and thin wall to blend with shaft. Available in:1/4" (60 gr.), 5/16" (70 gr. 100 gr. 125), 11/32" (100 gr. 125 gr. 145 gr. 160 gr. 190 gr) : 23/64" (125 gr. 145 gr. 160 gr.) Sold by the dozen, 100 pack and 1000 pack. Please specify.