For the DIYers and machinists out there, these Grainger drill rods are pretty solid for precision work. They come in a 3-pack of O1 oil-hardening steel rods that measure 9/64 inch in diameter (that's 0.1406 inches if you prefer decimals). The tolerance is tight at +/- .0005 inches, which means these are consistent and accurate for detailed projects. Each rod is 36 inches long with a maximum hardness of 275 BHN on the scale. The finish is smooth at 15 RMS max, and they meet several industry standards including SAE J437 and ASTM A-681-94. O1 steel is great because it hardens well and holds an edge, making these suitable for making tools, punches, or other metal parts that need durability. Whether you're working on custom tools, model building, or any project requiring precise steel rods, these should handle the job. The 3-pack is convenient since you'll have extras for future projects or mistakes. Definitely professional-grade material for serious hobbyists or tradespeople.
Free 30-day returns 
Free 30-day returns
