Here I will show you with images and videos how you can spin your pen on your hand.

First check out how I spin my pen. 1> First you need to hold your pen like this on your hand https://z-1-scontent.fmaa1-2.fna.fbcdn.net/v/t1.0-9/14317364_291406031243829_1271576276507545996_n.jpg?oh=941755ef0e8dbc1defdefde0e159544b&oe=58729F47 2>Then just streach your fingers like this without losing your grip on the pen[difficult on the first time] https://z-1-scontent.fmaa1-2.fna.fbcdn.net/v/t1.0-9/14354953_291406034577162_8485813152920242312_n.jpg?oh=4a382f5455c0b83ef70524e617becfe7&oe=58806DBD 3>Bring the fore finger above the middle finger while holding the pen https://z-1-scontent.fmaa1-2.fna.fbcdn.net/v/t1.0-9/14358993_291406207910478_5341637333224880506_n.jpg?oh=3600285667107acc0781affc9963b35d&oe=587E9E1D 4>Close your last two fingers fully while bending your 2nd and 3rd fingers https://z-1-scontent.fmaa1-2.fna.fbcdn.net/v/t1.0-9/14322261_291406254577140_961459939483457609_n.jpg?oh=23f558d923e3175fbc945b3dada63223&oe=5883B9F0 https://z-1-scontent.fmaa1-2.fna.fbcdn.net/v/t1.0-9/14322627_291406481243784_2246672834969466650_n.jpg?oh=a747f42818c49edca94d59581ccf4981&oe=583E1CE1 That's it guys. You need to practice. It took me few days to perform one perfect rotation and almost a moth to perform continuous rotations without stop

Here is a video guide on how to do it.

If you have any difficulty on this, comment below