This is the gen 2 pro series expansion. It's everything the Carbon Fiber Special Gen 1 & Gen 2 Pro Series are missing plus more. When you become advanced enough to handle thin picks, this is the set you must have. *Expansion Upgrade contains 10 Ultra Thin Picks & EDC Case (Tensioners Not Included In Upgrade) When you are ready to pick locks with the narrowest keyways, these profiles are designed specifically to navigate tight warding. The micro picks are perfect for stepping through pins with great feedback and awareness. These picks are also laser engraved so that you have reference points to where the pins are located from the keyway. Product dimensions are as follows: Handle Thickness = 2.5mm Profile Thickness = .5mm ~.48mm Profile Length = 38mm Profile Height = 2 ~ 1mm Profiles Included: Quint Rake Short Quad Rake Short Quad Rake Micro Staff Pick - (Not laser engraved) SOF Short Double Tap SOF Medium Micro Short Cutout Micro Short Micro Medium