The black 2h crossbow is a two handed crossbow that requires a Ranged level of 25 to wield. Black crossbows are a possible reward from level 1 Treasure Trails, but unlike most crossbows, they cannot be made using the Fletching skill. It has a base damage bonus, unlike the black crossbow, but it also requires two hands and shoots much more slowly.
As with all black equipment, this item cannot be made from raw materials using the Smithing skill.