Hawaiian style Barbed Shaft for Polespear. 5/16” (8mm) diameter x 16” (40cm) Threaded 6mm. Made of 17-4 Precipitation Hardened stainless with heavy duty 3.5” barb. Threaded M6 for use with any 6mm threaded tips or Magnetic Tip which does not require a threaded adapter. Tip slides over the threads held on magnetically.