What is a Knit King Jac 40 Accessory used for it is listed as Brother Knitting Machine Accessory?

Answer:
A Jac 40 is an accessory that holds a punch card. It unit hangs around the knitter's neck. The card is advanced manually with a knob before each row. Little"fingers" are either able to protrude through the holes in the card or are stopped by the absence of the holes, which is how the pattern is read from the card. The user then manually pushes needles forward with the protruding "fingers" of the jac 40. Passap always had one for their 5 mm machines that used 40 stitch punch cards. There was also a Japanese gauge (4.5 mm) jac 40 produced. If you buy one, make sure it is the appropriate gauge for your machine.
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