be deflected 34 cammed out 34 by cam rise surfaces 41 shown in fig2 and 5 and return to their normal shape when set and held between cam rise surfaces 41 on cams 40 disassembly is performed in an opposite manner by twisting tip 35 one quarter turn the embroidery tool 10 includes two interfitting components or parts barrel 11 and shaft 31 the shaft body 42 includes a smooth wall bore 43 extending entirely therethrough so as to present openings at opposite ends forward end 44 of the bore 43 comprises the cams 40 as described above a pin 29 is formed on one side of the shaft body 42 to control the position of shaft 31 and the needle 28 when assembled the rearward end 45 is chamfered to provide an unobstructed channel for the yarn or thread used for embroidery the exterior surface of body 42 provides a smooth frictionless mating surface for barrel 11 in a preferred embodiment polycarbonate was used although other plastics or metals may be used in a preferred embodiment spring 32 had a diameter of 0 30 with a 1 250 compression length 0 350 maximum compressed length overall length 1 725 and a 0 125 preload the embroidery tool is assembled by selecting the appropriate interchangeable needle assembly 34 and inserting it in shaft 31 the various needle sizes available are the needle 28 thus far described is a conventional hypodermic cannulation needle design but to adapt the assembly 34 for use in the embroidery tool contemplated herein the assembly 34 is modified by providing a hole.