How do I drill holes for fence posts?
| Post | Hole diameter | Depth |
|---|---|---|
| 4x4 in concrete | 10-12 in | Frost line plus 6 in |
| 4x4 in gravel | 8-9 in | 24-30 in |
| 6x6 in concrete | 12-14 in | Frost line plus 6 in |
| Rail or picket pilot holes | Bit 1 mm under the screw shank | Through the rail |
Sequence: mark the line, call 811, dig with a post hole digger or auger, check plumb with a level on two faces, then set with concrete or compacted gravel. Do not drill through a utility locate mark, and re-check depth before pouring.
Tool notes: one-man augers need a firm stance and low speed; in rocky soil a digging bar saves the gearbox. For rail pilot holes, a cobalt or brad-point bit stops splitting.
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, 13 pcs, M35, imperial, metal case | $59 | 13 pcs | 247 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, 21 pcs, M35, imperial, metal case | USD 59.00 | 717 g | 7-12 days |
| Cobalt Drill Bit Set, 13 pcs, M35, imperial, metal case | USD 59.00 | 247 g | 7-12 days |