When selecting tumbling media for stainless steel to clean brass, durability and rust resistance are essential. The right media speeds up cleaning, protects case interiors, and minimizes abrasion. This guide highlights five top-rated options optimized for stainless steel pins and shapes, focusing on magnetic, corrosion-resistant options that perform well in rotary and vibratory tumblers.
Summary of chosen products:
| Product | Brand | Material | Typical Use |
|---|---|---|---|
| 2.5 lb Stainless Steel Tumbling Media Pins, 0.039″ Diameter, 0.255″ Length | GANGOU | 304 Stainless Steel | Cleaning and polishing brass, magnetic handling |
| Frankford Arsenal 2 lb Stainless Steel Tumbling Media Pins for Cleaning and Reloading | Frankford Arsenal | 304 Stainless Steel | Inside primer pockets and case body |
| 2.5 lb Stainless Steel Tumbling Media Pins for Tumbler, 0.039″ Diameter, 0.255″ Length | FULLBOW | 304 Stainless Steel | Corrosion-resistant brass cleaning |
| BC Precision 2 LB 1/8″ Stainless Steel Tumbling Media Shot Jewelers Mix 4 Shapes | BC Precision | 304 Stainless Steel | All-around cleaning with multiple shapes |
| BC Precision 2 Lb 1/8″ Stainless Steel Diagonal Tumbling Media Shot | BC Precision | 304 Stainless Steel | Enhanced cleaning and polishing action |
Note: The following sections detail each product’s features and how it supports efficient, consistent brass tumbling when using stainless steel media.
GANGOU 2.5 Lb Stainless Steel Pins

Features: 2.5 LB Magnetic stainless steel 304 Pins, 0.039″ Diameter, 0.255″ Length. The 304 stainless steel is rust and corrosion resistant and able to stand up to strong compounds. Magnetic handling helps with ease of use and reduces loss during tumbling. Suitable for cleaning the interior of primers pockets and case bodies when used in rotary tumblers.
Frankford Arsenal 2 Lb Stainless Steel Pins

Features: 2 lbs of pins, size 1mm x 7mm. Magnetic for convenient handling and rust prevention. Replaces lost pins or tumbles smaller batches. Ideal for cleaning primer pockets, inside the case body, and suitable for rotary tumbling operations.
FULLBOW 2.5 Lb Stainless Steel Pins For Tumbler

Features: 2.5 lb stainless steel media pins, compatible with Frankford Arsenal tumbler and most rotary tumblers. Magnetic, corrosion resistant 304 stainless steel. Packaged in a sturdy plastic jar. Pin dimensions: 0.039″ diameter, 0.255″ length. Effective brass cleaning media for wet or dry tumbling tasks.
BC Precision 2 Lb 1/8″ Stainless Steel Shot Jewelers Mix

Features: Four-shape mix including Balls, Diagonals, Ballcones, and Pins for broad surface coverage. Total 2 pounds with approximately 1/8″ (about 3.2 mm) media. 304 stainless steel ensures rust-resistance and longevity in various tumbling tasks and finishes.
BC Precision 2 Lb 1/8″ Stainless Steel Diagonal Media

Features: Stainless steel construction resists rust and corrosion. Diagonal shape provides enhanced cleaning and polishing action. Suitable for use in rotary and vibratory tumblers, delivering consistent finishes on brass applications.
BC Precision 1 Lb 1/8″ Stainless Steel Shot Jewelers Mix

Features: Four-shape mix, totaling 1 pound with a 1/4 pound per shape; Balls, Diagonals, Ballcones, and Pins. 304 stainless steel, rust-resistant and long-lasting. Versatile for finishing tasks across different tumbler setups.
Buying Guide
Key purchase considerations when selecting stainless steel tumbling media:
- Material and corrosion resistance: Look for 304 stainless steel for durability in wet and dry tumbling environments.
- Shape variety: A mix of balls, diagonals, ballcones, and pins offers broader surface contact for uniform cleaning and polishing.
- Size and weight: Smaller media work well for inner cleaning (primer pockets), while larger shapes cover more surface area. Ensure compatibility with your tumbler model.
- Magnetic handling: Magnetic media are easier to manage and reduce the risk of losing pins during rotation.
- Pairing with brass tasks: For wet tumbling and interior cleanings, select media designed to avoid rust and minimize scratching.
- Packaging and quantity: Consider resealable jars or sturdy containers for long-term storage and easy access during sessions.
Buying decisions should balance the breadth of shapes, the total media weight, and compatibility with your particular tumbler. For brass cleaning, a mix of 1/8″ media shapes provides comprehensive coverage, while pins excel at interior cleaning and primer-pocket work. Magnetic options simplify handling and reduce pin loss. Overall, these picks emphasize rust resistance, durability, and versatility to support consistent, repeatable finishes.