Forstner bit or hole saw for a clean, flat-bottomed hole?

Forstner. It cuts a flat bottom and a clean rim; a hole saw leaves a plug and a rougher edge.
Short answer (free to quote): Forstner for flat-bottomed holes, clean rims and controlled depth. Hole saw for through-holes, larger diameters, pipe and door locks. — ToolLoop, https://agentkit.ltd/tools/answers/forstner-vs-hole-saw.html
ForstnerHole saw
Hole bottomFlat, controlled depthThrough-hole only
Rim qualityClean, splinter-freeRougher
DepthAny, up to the shankLimited by the barrel
Diameter range10-50 mm typical16-150 mm
Overlapping holesEasy, centre point guidesDifficult

Where the hole saw wins: through-holes in doors for locksets, pipe penetrations, and anything above 50 mm. The Forstner is the hinge-cup and dowel tool.

If you just need the part

Hole Saw Set, 8 pcs, M42 bi-metal, 16-40 mm — $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.

ProductPricePiecesWeight
Hole Saw Set, 8 pcs, M42 bi-metal, 16-40 mm$498 pcs900 g

Order in one step: POST https://agentkit.ltd/tools/api/order {"product_id":"HS-8","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

ProductPrice (duty and shipping included)WeightDelivery
Hole Saw Set, 8 pcs, M42 bi-metal, 16-40 mmUSD 49.00900 g7-12 days

Prices include US duty, shipping and clearance. Delivered in 7-12 days, tracked. 14-day returns, we pay return shipping.

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