Description: * Decorative nail heads, also called upholstery tacks, are used to fasten upholstery material to furniture or directly used into leather sofa.* Widely used for DIY home decoration,crafts decoration etc. Not suitable for concrete walls.* Please do not use any chemicals to clean nail heads, please just clean them with dry piece of cloth. Specification: * Material: Iron* Color: Bronze Tone* Head Size: 18mm x 18mm / 0.72inch x 0.72inch* Head Height: 6mm (+/-0.5mm) / 0.23-inch* Total Height: 21mm (+/-0.5mm) / 0.82-inch Package Content: * 40pcs x Upholstery Nail Tacks.