W1D3166-A W1 Tool Steel Rod, Material Tool Steel, Material Grade W1, Overall Length 36 in, Heat Treatable Yes, Heat Treatment Water Hardened, Mechanical Finish Precision Ground, Outside Diameter 3/16 in, Outside Diameter Tolerance +/-0.0005 in, Yield Strength 55,000 psi, Fabrication Hot Rolled, Rockwell Hardness C28, Brinell Hardness 275, Tensile Strength 95,000 psi, Machinability 100 Percent, Length Tolerance +1/8 in/-0 in, Includes Material Certificate Yes