Features 1、Made of high density stainless steel for durability and toughness. 2、The maximum speed can reach up to 30000rpm. 3、Fine processing, it could absorb the shocking and impact. 4、Widely used on drilling machines, grinding machines, lathes, and other processing machines. 5、100% brand new and high quality. Specification Features: Made of high density stainless steel for durability and toughness. The maximum speed can reach up to 30000rpm. Fine processing, it could absorb the shocking and impact. Widely used on drilling machines, grinding machines, lathes, and other processing machines. 100% brand new and high quality. Specifications: Material: Stainless steel Weight: Approx. 594g / 21oz Package List: 1 * Tool Holder Package List