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This Adapter is used on .17 Cal. Rods to clean tight bore .22 Caliber Rimfire Rifles. The adapter allows you to use the standard #8-32 threaded rifle accessories with the smaller diameter rod. NOT FOR USE ON CLEANING .17 Cal. Firearms. Converts # 5-40 (.17 Cal.) threads to # 8-32 (.22 Cal. Rimfire) on Pro-Shot rods .17 Cal. and .20 Cal rods.
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