Practical universal set for use with wood plastics ne metals tin etc whether counterboring countersinking milling or drilling in this set the right tool for the right job can be found to ensure their durability each tool has a titanium coating so that durability lasts up to 6 times contents include 1 milling drill 1 twist drill 4 12mm for drilling different sized holes 4 6 8 10 12mm 1 conical drill 8 20mm for drilling through thin materials 1 counterbore 3 12mm for counterbori