for the 100% copper made for fitting 5/16" vaired shafts and weight 195 Grains each, glue-on type,you should need taper little of the point end of your arrow shafts,quite simple and easy glue on,just in few seconds to fit.
for the iron&steel alloy made for fitting 5/16" vaired shafts and weight 155 Grains each, glue-on type,uniform tube size: no need taper the point end of your arrow shafts,quite simple and easy glue on,just in few seconds to fit.
i change the whistle points head design to let each have the whistle,now in market some the whistle points can't have the whistle sounds.