If you need a new chuck key for your drill, you'll find the most common types at Clas Ohlson. We sell the the type S2 chuck key which fits most 13 mm chucks and the type S14 chuck key which fits most 10 mm chucks. You might have an old drill and lost the chuck key or a bought a new one that didn't come with a chuck key. Our Bosch chuck keys fit both handheld electric drills and pillar drills or drill presses. Your drill bit changes will be a lot easier with the right size chuck key.