Powers Fastening Innovations 02896 1/4-Inch Inside Diameter by 1-1/8-Inch Outside Diameter Type 304 Sealing Washer with Epdm Seal, 100 Per Box The Zama Nailing is a tamper proof nail drive anchor which has a body formed from Zama alloy Can be used in concrete, block, brick or stone 100 per box Nails are available in carbon or stainless steel