Solid carbide micro-drills
Guhring's ExclusiveLine solid carbide micro-precision drills
Without internal cooling are available for drilling depths up to 4xD and 7xD in the diameter range from 0.8 to 3.0 mm, while for holes up to 8xD and 15xD, those with internal cooling are offered - pecking is not required for holes up to 15xD.
