brass Imported SPECS: Tipton Ultra Gun Jag .17 caliber with 5-40 threads DURABLE: Constructed from brass with a solvent proof coating EASE OF USE: Pointed tip for easy patch penetration CONVENIENT: Slotted grooves hold the patch securely on the jag VERSATILITY: Tipton Ultra Gun Jags are available in a variety of calibers with standard thread sizes GUARANTEED: This product is covered by a limited lifetime warranty provided by Tipton. Please contact Tipton customer service for assistance