Beastcrafting opens when both of its requirements are met: Hunting level 15 and one trapped Bushland Rabbit. The rabbit itself needs Hunting level 15, so the level lets you hunt it and the first successful trap opens the skill.

An unmet requirement is not a demo exclusion

The Beastcrafting entrance carries those two requirements and no demo-exclusion condition. If the skill is still closed at Hunting level 15, trap a Bushland Rabbit. Each Beastcrafting recipe then keeps its own requirements.

Where do Hobforge Gloves come from?

Completing Hobgolbin Camp always awards one Hobgolbin Chest and 100 Gold Pieces. The camp opens after you defeat Hobgolbin 15 times.

The chest's contents are picked by weight. Hobforge Gloves have a weight of 1 against the chest's total of 53, the lowest of any entry, so they are its rarest content.

What the gloves do

The gloves fit the Smithing Gloves Toolbelt slot and give +1% Output Doubling chance, +1% step skipping chance and +2% XP in Smithing.

They are also an ingredient of Sulfur Protection Gloves, together with 4 Magic Cowhide. Crafting that recipe consumes the pair, so keep one for your Toolbelt if you craft it.