Golem-Skin Gauntlets is a common Artifact — Equipment card from Double Masters (2XM), collector number 259. Current market price: $0.19 (foil $0.34), TCGplayer market prices via Scryfall.
Equipped creature gets +1/+0 for each Equipment attached to it. Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)