KitsPro 2pcs Tipped Keyhole Bit 1/4" Shade, Keyhole T-Slot Woodworking Cutter Router Bit used for slotted and wood screw holes

cutting edge broke off when using it on only the third cut. Filed complaint via Amazon who forwarded it to the seller but did not even receive a response from the seller.

These are router tips, not tips for a Dremmel type tool.