Double ended drill bit 4,2mm

• Double ended Drill Bits for Wood-Aluminium
• Double End HSS DIN 1897 RN 4,2 mm
• Perfectly suited for all 4,0 mm diameter rivets

Our opinion:

We think this is a very good quality drill bit for little money. Drilling through wood and aluminium was really no effort at all. And it lasts double as long as a normal one, because it has two ends. So whenever your first drill bit has gone blunt, just turn it over and use the other side.

Although, one end really lasts a long time: we use these drill bits ourselves too and I’m still drilling with the same drill bit and the same end, with as little effort as in the beginning, after five large flight cases (= more than 1,000 holes through wood and aluminium in total). I haven’t even had the opportunity to try the second end out, as the first one hasn’t become noticeably less sharp yet.