Features 【Preferred Materials】：This ER32 balance collet is selected, carburized and hardened, with a carburized thickness >0.8mm. The surface is hard and the interior has toughness，Makes it durable and long life. 【High Percision】: ER32 Tool Holder With Fine processing and impact resistance, it is suitable without the key slot under the high speed uses. 【High Speed】: High speed operation, the transient equilibrium adjusts G2.5/30000rpm which can improve work efficiency. 【Package】: Well packed in a container which can protect balance collet against damage during shipping or storing. 【Widely used】: The balance collet chuck is widely used in CNC engraving machines and machining center. Specifications: Type: ISO30-ER32 Material: Stainless steel Speed: 30000RPM Color: Silver and black Size: 120 x 50mm / 4.72 x 1.96" Quantity: 1 Package Includes: 1 x ER32 Balance Collet Package List