Well packed in a container which can protect balance collet against damage during shipping or storing. High speed, the maximum speed can be up to 30000rpm. Great processing and fine making, it could absorb the shocking and the impact power. This ER32 balance collet is made from high density stainless steel for durability and toughness. Widely used on drilling machines, grinding machines, lathes, and other processing machines., Weight: 1.29962503449 Pounds, Manufacturer: Reeatel