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This post describes how to work a yarn over. A yarn over (yo) is a single increase, which forms a hole in the knitted fabric. It is the main increase used in lace knitting.
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Ravelry: Barley worsted pattern by tincanknits
Northward – a free cable hat pattern!, Tin Can Knits
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front playing a hole knit
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How to Knit With Recycled Yarn – tin can knits
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How to work a yo – yarn over increase
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5 Tips for M1 Increases – Elizabeth Smith Knits
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Beginners Tip - How to Adapt Pattern Sizes from an Off-Gauge - YAK
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The Basics of Slip-Stitch Knitting – TONIA KNITS
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