longitudinal member 22 is provided with a locking means 26 which consists of a thin tab with a dent locking portion 28 in operation as shown in fig7 the collar stay 20 is inserted into the receiving member 12 of the hinge member 4 until the dent locking portion 28 engages with the locking hole 14 the button 24 is then inserted into the buttonhole 30 in this way the collar is held out stiffly and the collar may be easily rotated or folded down about its break line 10 therefore it would be easy to put on a tie after the collar stay system in accordance with the teachings of the present invention has been installed referring to fig4 shown therein is a second embodiment of the collar stay in accordance with the teachings of the present invention since the embodiment of fig4 is substantially the same as that of fig2 and 3 except for some differences described hereinbelow those elements which are the same their like reference numerals and a description of their interconnection and operation will be omitted in fig4 the end of the collar stay 20 opposite the bent locking portion 28 is provided with a hole 32 in addition the hole 32 together with the end of the collar stay 20 is split as a result of the construction of the split hole 32 in the.