Based on this product's specifications, here are some alternatives and similar models
Drill Bit Festool D 4-NL 11 HW-DF 500 Diameter 4mm Length 1.1cm
Summary description:
The Festool D 4-NL 11 HW-DF 500 drill bit features a diameter of 4mm and a working length of 1.1cm. It is designed for precision drilling, ensuring high performance and durability. Ideal for various applications in woodworking and construction.