Screw into your interchangeable cable ends to hold a current project while using the tips for another.

Large (black) for sizes Us9 (5.5 mm) to US15 (10 mm)

Small (white) for sizes US2 (2.75 mm) to US8 (5 mm)

Mini (red) for sizes US000 (1.75 mm) to US1.5 (2.5 mm)