5/16 Field Screw-On Blade - screwed onto the radius unstrung
Threaded arrowhead provides better attachment to arrows.
For the unstruck beam.
5/16" = 7.94 mm;
11/32" = 8.73 mm
23/64" = 9.12 mm
NOTE! Depending on the size/parameter/weight of the arrowhead, it may differ in color/size from that shown in the photo.