The KR21 Electronic Knit Contour Unit releases you from the difficult and complicated computations of casting on, increasing and decreasing the number of stitches when you are shaping a garment. A built in digital row counter covers up to 999 rows on the LCD screen. Both 1/2 and1/4 size patterns are usable by a switch lever. The unit comes with four different styles of knitting patterns consisting of Lady's Pullover of half body pattern in 1/2 scale, Lady's Cardigan of half pattern in 1/2 scale, Men's Pullover of full body pattern in 1/4 scale and Childs Cardigan of half body pattern in 1/2 scale.

By setting the change lever to the number of colours to be used for one row of finished knitting, you will be free from the complications when knitting Double Jacquard, Multi Coloured Jaquard, Multi Coloured Slip Stitch or Intarsia with Electronic Intarsia Carriage, as the change lever works together with the row number display. It can also be used by itself as a computing device for hand knitting.

The KR21 can be used with model numbers, SK830, SK840, SK860, SK890, and plastic knitters LK150 and LK140.