You will receive 1 Crafters key and can redeem them at /warp crates for:

Crafters Armor: (Helmet, Chestplate, Leggings, and Boots)
Crafters Weapons: (Sword, Axe, Mace, Bow, and Crossbow)
Crafters Tools: (Pickaxe, Shovel, and Hoe)
Crafters Wings: (Cosmetic Only, not functional for flight)
High Value Virtual Spawners

Chances for all items can be found in-game in the crate GUI and will always equal 100% when combined