The 256 piece threading forms set comes in a handy case with buttons, spools, theads and endpieces. With the many parts in 6 brightly colored colors, practicing threading is really fun! The buttons have 1 to 5 holes. The corrugated edges are a haptic experience. 256 pieces: 180 buttons, 48 ​​rolls, 12 end pieces, 16 thread cords (red, yellow, green, blue).