The Stainless Steel Media Pins are ideal for rotary tumbling brass. When combined with a liquid bath they deliver unmatched cleaning performance. Doesn't create dust and also cleans the inside of cases, primer pockets and flash holes. Stainless steel also doesn't damage brass and lasts for multiple uses. Size 5 lbs Type Tumbling Media Series Tumbling Media Weight 5 lbs Caliber multi-caliber Function Clean Cases Material 304 Stainless Steel Quantity 5 lbs Media Type Magnetic Stainless Steel Pins Media Capacity 5 lbs Compatible With Any Tumbler Micrometer Type N/A