sourcingmap 11mm Head Dia 17mm Height Upholstery Nail Thumb Tacks Push Pin Silver Tone 30pcs. Total Height: 17mm / 0.67"; Head Diameter: 11mm / 7/16" Color: Silver Tone; Weight: 28g Product Name: Upholstery Tack Nail Material: Metal Package Content: 30pcs x Upholstery Tack Nail Description Used to tack memos on a cork board. These tack nails are perfect to secure paper items or photos onto the the cork board without causing any damage. Ideal for hanging or holding down charts, banners, calendars and much more. Tack nails have unlimited uses around home, office and school.