Why do some TWIST™ interchangeable tips have tightening holes and others have little “divots”?

Handy tips, tricks, and product info to help you out.

All TWIST tips that have a tightening hole drilled near the threaded end are made of solid stainless steel. Larger tips are hollow (because they would be too heavy if they were solid) so a hole cannot be drilled. The divots you see are crimps holding the threaded piece in place.