Spine stitch is a simple cable stitch that produces a look which resembles the spine, hence its name. The first row of the spine stitch involves combinations of C2Fs and C2Bs and the second row is purling the whole row. The final result of the stitch is an intricate design that looks more complicated and involved than it actually is.
If you like the spine stitch, you might enjoy the Spine Rib Cowl free pattern.
Multiple of 4 sts
Here is a video tutorial on how to knit C2B and C2F without a cable needle. This technique is a lot faster than when using a cable needle.
Row 1 (RS): *C2B, C2F; rep from * to end of row.
Row 2: purl.
Repeat Rows 1-2.