Spinning

Have the DL lean a little into the OL

Drop his hips low/bend his knees

Throw the elbow back in the direction he is spinning - the hand should smack the OL on the back of his leg or the butt

Keys: Staying LOW on the spin & Keeping tight to the OL

When I'm coaching OL to counter the spin the 1st thing I tell them is to back off a little when the guy starts to spin; get separation either with a punch or with the feet. Then we'd play 'patty-cake' with him and mirror with our feet.

So... the last thing an OL wants is a DL tight to his body and spinning.

The only drawbacks to the spin can be guys getting out of control and losing rush lanes, or over-using it then you become open to a draw.

Good post by BlackFly 73 regarding technique.
We use the spin in conjunction with a blitz to the gap vacated by the spin.
For example, have the 3 spin to the A gap and Will blitz the B gap.

T G C G T
3 E
W

That didn't come out right.

T..G.C.G..T
............3....E
..............W