Vintage Singer buttonholer attachment set. This set is compatible with low shank models including the 15, 127, 128, 66, 99, 201, 221 & 222K Featherweight, etc. Comes with the rarley seen black plastic case (most are green), instructions, thumb screw, buttonholer #160506, throat plate cover with mounting screw, the 5 original templates plus set #160668 which contains 4 additional templates. Nice vintage condition, clean with typical signs of age / use. Original, genuine Simanco accessory.