Timeless Vintage Aesthetic:KY-2AB and KY-3AB brass hollow tube old key, these exquisitely crafted hollow keys feature an authentic antique brass finish, perfectly capturing the nostalgic charm of bygone eras. Their classic design adds an elegant vintage touch to any space, making them ideal for antique enthusiasts and decor lovers. Product Material: The utility hollow key is made of die-cast zinc and antique brass plating. It is strong, antioxidant-resistant, and durable. Product Dimensions： KY-2AB Key Overall Length: 2 3/8" Shaft Length: 1 1/2" Bit: 3/16" W x 3/16" H Inner Cylinder Diameter: 5/32".KY-3AB Key Overall Length: 2.4", Shaft Length 1.4", Outside Diameter 0.2", Hollow Shaft I.D. 0.12", Flag Length 0.2", Flag Height 0.18" (from Shaft O.D. to Flag Edge), Flag Thickness 0.08- 0.11", total height of flag + shaft diameter 0.4". Manual measurement: Please allow slight errors. Vintage Design： These Antique Brass Skeleton Keys feature an antique brass finish that adds a touch of old-world charm to our surroundings. They are perfect for those who appreciate the beauty of old skeleton keys. After-Sales： If you have questions about this product, please get in touch with us, including pre-sale and post-sale questions. We will do our best to solve your problem. Timeless Vintage Aesthetic:KY-2AB and KY-3AB brass hollow tube old key, these exquisitely crafted hollow keys feature an authentic antique brass finish, perfectly capturing the nostalgic charm of bygone eras. Their classic design adds an elegant vintage touch to any space, making them ideal for antique enthusiasts and decor lovers. Product Material: The utility hollow key is made of die-cast zinc and antique brass plating. It is strong, antioxidant-resistant, and durable. Product Dimensions： KY-2AB Key Overall Length: 2 3/8" Shaft Length: 1 1/2" Bit: 3/16" W x 3/16" H Inner Cylinder Diameter: 5/32".KY-3AB Key Overall Length: 2.4", Shaft Length 1.4", Outside Diameter 0.2", Hollow Shaft I.D. 0.12", Flag Length 0.2", Flag Height 0.18" (from Shaft O.D. to Flag Edge), Flag Thickness 0.08- 0.11", total height of flag + shaft diameter 0.4". Manual measurement: Please allow slight errors. Vintage Design： These Antique Brass Skeleton Keys feature an antique brass finish that adds a touch of old-world charm to our surroundings. They are perfect for those who appreciate the beauty of old skeleton keys. After-Sales： If you have questions about this product, please get in touch with us, including pre-sale and post-sale questions. We will do our best to solve your problem.