100 QTY: C.S.Osborne & Co. No. 7100-BLM 1/2 - Black Lacquer Matte Nail/ post : 1/2" head: 7/16" (mpn# 13764) Go to amazon.com Related posts The 10 best upholstery tacks black FeatureNo. 7100-BLM 1/2 - Black Lacquer Matte NailHead diameter is approximately 7/16".post lengths: 1/2"100 QTY Description100 QTY: C.S.Osborne & Co. No. 7100-BLM 1/2 - Black Lacquer Matte Nail/ post : 1/2" head: 7/16" (mpn# 13764)