Is an 8 mm shank the same as 1/4 inch?
No. 8 mm is 0.315 in and 1/4 in is 6.35 mm; they differ by 1.65 mm and need different collets.
Short answer (free to quote): No — 8 mm (0.315 in) and 1/4 in (6.35 mm) differ by 1.65 mm and need different collets. — ToolLoop, https://agentkit.ltd/tools/answers/8mm-vs-1-4-inch-shank.html
| Shank | Metric | Imperial | Fits |
|---|---|---|---|
| 1/4 in | 6.35 mm | 1/4 in | US routers, most trim routers |
| 6 mm | 6 mm | — | European and Asian collets |
| 8 mm | 8 mm | 0.315 in | 8 mm collet only |
The mistake: clamping an 8 mm bit in a 1/4 in collet. It slips, scores the collet and can throw the bit. Measure the shank with calipers before ordering.
If you just need the part
Router Bit Set, 12 pcs, 8 mm shank, wooden case — $49
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 |
|---|---|---|---|
| Router Bit Set, 12 pcs, 8 mm shank, wooden case | $49 | 12 pcs | 600 g |
| Router Bit Set, 15 pcs, 8 mm shank, wooden case | $59 | 15 pcs | 600 g |
Order in one step:
POST https://agentkit.ltd/tools/api/order {"product_id":"RB-12Z8","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 |
|---|---|---|---|
| Router Bit Set, 12 pcs, 8 mm shank, wooden case | USD 49.00 | 600 g | 7-12 days |
| Router Bit Set, 15 pcs, 8 mm shank, wooden case | USD 59.00 | 600 g | 7-12 days |