The end stoppers screw into your cable ends to securely hold a current project while using the tips for another project. M stoppers fit onto all [M] coded cables (1,5 mm - 2,5 mm / US 000 - 1.5). S end stoppers fit onto all [S] coded cables (needle tip sizes 2,75 mm - 5 mm / US 2 - 8). L stoppers fit onto all [L] coded cables (needle tip sizes 5,5 mm and larger / US 9 and larger).
S = white stoppers
L = black stoppers
M = red stoppers
Includes 2 stoppers.