Diamond's multi-stage pitch hole prep on the link plate creates maximum bearing areaEngineered material minimizes impurities, which maximizes tensile and fatigue strengthDiamond Chain Company's proprietary carbon content and special alloy chemistries maximize the effectiveness of the heat treatment processProprietary heat-treating process ensures consistent case hardening depth, which results in maximized wear life, less downtime, and lower costsSold by the eachSpecification: chain number & pitch: 40 / 1/2 ininside width: 5/16 inlink type: Connectinglink plate height: 0.475 inmaterial: Carbon Steelpin diameter: 0.156 innumber of strands across: 2chain overall width: 1.29 inchain construction: Spring Clipstandards met: ASME/ANSI B29.1roller diameter: 0.312 in