Material: ZINC PLATED STEEL Assembled Product Length: 0.75" Fastener Drive Type: ROBERTSON Assembled Product Height: 0.13" Assembled Product Width: 0.13" Fastener Diameter (Imperial): 0.13" Fastener Length (Imperial): 0.75" Fastener Length (Metric): 19.05 MM Fastener Diameter (Metric): 3.3 MM . Bright zinc plated