M1T. It's Methylated Testosterone. Literally. M1T= Methylated 1-Testosterone.
I've heard that dbol will show raised T-levels on a bloodtest but I don't know how accurate that is. This is supposedly why Arnold used Dbol as a base or androgen replacement. Again, things have changed since then so take it with a grain of salt.
On the other hand, man the fuck up. If you aren't ready to pin, in my opinion you aren't ready for gear period. To be honest its not bad at all. I don't even feel 25g pins. Stick with 25s and you'll be g2g.