Convert your 8mm polespear tip to accept 6mm threaded tips. Perfect for adding inexpensive paralyzer tips while lobstering in the Bahamas, Great for adding inexpensive flopper tips to your polespear when conditions call for using a more utilitarian tip due to rock strikes and coral strikes. Perfect for implementing lionfish tips, and slip tips sometimes only available in 6mm thread.  Constructed of high quality stainless steel for anti-corrosive durability, and years of dependable service. Knurled outer surface body, for easy tightening and removal by hand.