I've only used them on softwoods so can't comment on how well they work on hardwoods. I've had no trouble with softwoods, but router bits are only as good as the router they're used on. So if your router doesn't have enough power these bits could burn you out, but that's true for all bits.
Wi-Fi router Keenetic Extra (KN-1713), white/grey
19 Review
Ultimate Guide to KOWOOD Router Pieces for Woodwork Beginners
11 Review
Premium Tongue & Groove Milling ๐ง Cutting Tools by KOWOOD: Precision and Performance Unleashed
10 Review
Enhance Woodworking Precision with Roundover Milling Rounding Edge Forming Tool
11 Review