Can you sharpen drill bits at home?
| Method | Bits it suits | Realistic result |
|---|---|---|
| Bench grinder + angle gauge | 3 mm and up, HSS | Good for wood and mild steel |
| Drill doctor style sharpener | 2-13 mm | Repeatable 118 or 135 degrees |
| Hand stone | Touch-up only | Rounds the point if you are not careful |
| Carbide bits | Diamond wheel only | Usually not worth it below 10 mm |
The two angles that matter: point angle (118 degrees for general work, 135 degrees for hard material) and relief behind the edge. If the relief is wrong the bit rubs instead of cutting and the hole work-hardens.
When to stop sharpening: once a bit is shorter than about 60% of its original flute length the web is too thick, and no amount of grinding brings it back.
Cobalt Drill Bit Set, 21 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, 21 pcs, M35, imperial, metal case | $59 | 21 pcs | 717 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-21M","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, 21 pcs, M35, imperial, metal case | USD 59.00 | 717 g | 7-12 days |