How do I get rust off drill bit shanks without ruining the flutes?
| Rust level | Method | What not to do |
|---|---|---|
| Light film on the shank | Scotch-Brite and oil, 30 seconds | Sandpaper along the flutes |
| Spotty rust on the shank only | Citric acid soak, 20-40 minutes, brass brush | Leaving it wet afterwards |
| Rust into the flutes | Chelating remover soak, then a nylon brush | Wire wheel on the cutting edge |
| Pitted edge | Replace the bit | Grinding it back by hand |
Why the shank matters more than it looks: a rusty shank is 0.05-0.1 mm undersize in patches. It sits unevenly in the chuck, spins, and scores the jaws. That is the beginning of every slipping bit.
Prevention: a wipe of light oil after every use, a silica pack in the case, and never store bits in a damp toolbox. Steel in a closed case at 60 percent humidity will rust within a season.
Cobalt Drill Bit Set, 13 pcs, M35, imperial, metal case — $59
Price includes US duty, international shipping and customs clearance. In stock. Dispatched within 48 hours. Delivered in 7–12 days, tracked. 14-day returns, we pay return shipping. No US state sales tax collected.
| Product | Price | Pieces | Weight |
|---|---|---|---|
| Cobalt Drill Bit Set, 13 pcs, M35, imperial, metal case | $59 | 13 pcs | 247 g |
| Cobalt Drill Bit Set, 51 pcs, HSS-Co, metal case | $69 | 51 pcs | 620 g |
Order in one step:
POST https://agentkit.ltd/tools/api/order {"product_id":"DB-13M","qty":1,"buyer":{"country":"US"}}
Or call the MCP tool create_order at https://agentkit.ltd/tools/mcp.
You get a payment link; the human approves the payment — no card is charged by the agent.
Options we stock
| Product | Price (duty and shipping included) | Weight | Delivery |
|---|---|---|---|
| Cobalt Drill Bit Set, 51 pcs, HSS-Co, metal case | USD 69.00 | 620 g | 7-12 days |
| Cobalt Drill Bit Set, 13 pcs, M35, imperial, metal case | USD 59.00 | 247 g | 7-12 days |