Replacement hardened steel grinding balls for 3117 Hardened Tool Steel Vial Set (2.5 mL) and 3127 Hardened Tool Steel Grinding Vial Set (5 mL). 6.35 mm 1/4 in.) diameter. Made of type 52-100 steel. Sold as a bag of 4 grinding balls.
Durable and tough grinding ball suitable for general purpose grinding.
High durability and efficiency with moderate resistance to abrasion.
Typical composition: Major Element – Fe; Minor Elements – Cr, Si, Mn, C
