Contains 10 Drills:
2 x 0.7mm
2 x 0.9mm
1 x 1mm
1 x 1.2mm
1 x 1.5mm
1 x 2mm
1 x 2.5mm
1 x 3mm
How to use:
Unscrew the head of the Miniature and Model Drill
Open the back of the Miniature and Model Drill
Find the tip that matches the drill bit you need 
Store the remaining tips inside the drill and close the back
Mount the tip i and insert the drill bit
Screw the head back on and you are ready to go