Keyhole Router Bit Set- 1/4 Inch Shank Router Bits,5 Pcs Router Bit Set 5/16&3/8 | eBay
1/4 Inch Shank Pattern Flush Trim Router Bit Set, Shank Carbide Pattern Router Bits Set, Template Straight Top Bearing Router Bits with 2 Regular Blades, Prevent Tear-Out, Suitable for Light Work -