45, 55, 60, 65 degree router bits: what does the angle actually change?

It changes the cutting geometry, not the profile. Higher angles are for harder material and finer finish; lower angles clear chips faster.
Short answer (free to quote): The angle describes cutting geometry: lower angles clear chips faster with more tear-out, higher angles give a cleaner finish in harder material at a slower feed. Ask sellers what the number refers to before comparing listings. — ToolLoop, https://agentkit.ltd/tools/answers/what-router-bit-angle-means.html
AngleBehaviourUse it for
45 degFast chip clearance, more tear-outSoftwood, rough shaping
55 degBalanced; the default for general workMixed hardwood, MDF
60-65 degStronger edge, cleaner finish, slower feedHardwood, plywood edges, fine trim

Important: on helical and spiral end mills the angle is the helix angle. On router bits sold as "55 degree", the number usually refers to the cutting edge geometry, and sellers use it loosely. Ask what the number refers to before comparing across listings.

The mistake people make: comparing a "65 degree" bit to a "45 degree" bit as if they were the same tool with a different setting. They are different geometries with different feed rates.

If you just need the part

Router Bit Set, 12 pcs, 1/4 in 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.

ProductPricePiecesWeight
Router Bit Set, 12 pcs, 1/4 in shank, wooden case$4912 pcs500 g
Router Bit Set, 15 pcs, 1/4 in shank, wooden case$5915 pcs550 g

Order in one step: POST https://agentkit.ltd/tools/api/order {"product_id":"RB-12W","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
Router Bit Set, 12 pcs, 1/4 in shank, wooden caseUSD 49.00500 g7-12 days
Router Bit Set, 15 pcs, 1/4 in shank, wooden caseUSD 59.00550 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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