1..17 cal jag 2.thread 5-40 3.for gun 4.accurate 5.nickel brass jag Cleaning jag is made by brass,Jag was plated by nickel,.17 cal,.22 cal,.243-6 mm,.25 -6.5 mm cal,270-7 mm,30-32 cal,.338-8mm,.35-9mm,.375 cal..40-416 cal,.44 cal,.45 cal,.50 calNote1.Unless otherwise specified all radii 0.8MM2.Part to be free of burrs and sharp edges3.Surface finish to be 0.8-1.3 micrins CLEANING JAG