Color (Duplicate): Silver Color: Silver Condition: New Corrosion Resistant: Yes Diameter: 1/4″ Drive Style: Drop In Anchor Setting Tool Grade: 18-8 Head Style: Dome Length: 1-1/2″ Material (Duplicate): 304 Stainless Steel Material: Stainless Steel Part Number: 046737837090 Product Type: Hammer Drive Anchors Size System: US Size Type: Regular System of Measurement: Inch Tolerance (IFI): Actual measurements may vary slightly /- depending on production run within IFI Tolerances Weight: 1 lb Using a pre-drilled hole, they are installed with hand tools (typically a hammer) Drive the pin into the anchor body, expanding the anchor, to form a tight fit 304 Stainless steel is durable and rust resistant The Pin or Nail is stainless steel. The body is Zamak alloy A 304 Stainless steel Hammer Drive Pin (or just drive pin) attaches fixtures to solid concrete or certain types of concrete blocks. They are also sometimes referred to as mushroom head anchors, nail in anchors, or drive nail anchors.