Standard threads, includes plastic travel case with 7 heads total: 1 brand new, 3 have been shot and resharpened, and the last 3 have been shot have some dings and still need to be sharpened. Not sure what these are worth but how about $165 TYD OBO which is $100 off new. Replace my blades for the 3 that need work are $45 if you don’t want to mess with resharpening.