Features 1、IMPORTED 40CR MATERIAL: Motor shaft spindle extension rod adapter is made of quality imported 40cr alloy steel material with good durability 2、ACCURATE AND WEAR RESISTANT: The motor spindle ER cutter rod has high accuracy, wear resistant and durability, high efficiency and fast, quenching processing 3、ENHANCED PERFORMANCE: Motor shaft extension rod adapter adopts vacuum hardening to improve hardness and good comprehensive mechanical properties 4、WELL PACKED: This ER20 collet is well packed in a protective container for safe transportation and convenient storage, you can use with confidence 5、FOR DEEP PROCESSING: Straight extended shank fits for deep processing, meeting the needs of extending the depth of processing. Great replacement for you Specification Item Type: Motor Shaft Spindle Extension Rod Material: 40cr Package List 1 x Spindle Extension Rod 1 x Storage Box