This is a punch needle pen exclusively for embroidery threads developed by DMC. The length of the needle can be changed by memory, so you can adjust the length of the loop to your liking. By changing the S/M/L size needles, you can embroider from thin threads to thick threads with this one. * This is the needle used in the PUNCH NEEDLE POUCH KIT. [Needle size and thread type] S (Small) :D MC8 thread, DMC 12 thread M (Medium) :D MC25 thread, DMC No. 5 thread L (Large) :D MC3 thread, [Set contents] Punch Needle Pen Needle: 3 types S/M/L Threading: 2