SZHOWORLD&reg; Brass 33mm Mini Quick Release Keychain Carabiner Snap Hook and Brass Key Ring 33mm Solid Brass Carabiner Clip + 30mm Brass Key Ring Material: Solid Brass (with grinding surface, without plating, keep the color of brass.); Spring part Material: stainless steel Light weight, high strength and highly resistant to corrosion Carabiner dimension: Length 33 mm, Thickness 4.8mm, hole diameter 5mm Spring clip design, quick release, never need to worry about goods falling off.