Connecting post or half-bolt
Today we will talk about how to knitconnection column. This column is used: in patterns for attaching at the desired point of the pattern; for processing and fixing edges; when the series is closed in circular and straight knitting; at margins at the edges; for sewing parts of the product; for connecting motives in a product; if you only need to knit a chain that uses the wrong side (Irish lace) to transfer the knitting from one point to the other. The connecting post is the lowest and dense column when crocheting. The connecting column is also called a half-loop, a blind loop, a connecting loop. Symbols of the connecting column: 
A video tutorial on knitting a connecting post. There is also a lot of useful information in the section.
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