Check the listing for details. Cratex #4 Mandrel Quantity 3. Condition: New. Listed at 20.00 USD. The Cratex #4 Mandrel Quantity 3 is a set of three mandrels designed specifically for surface grinding wheel applications. These mandrels are used to securely hold and center the grinding wheel in the chuck or machine spindle, providing stability and support during the grinding process. Made from durable and high-quality materials, these mandrels are essential tools for metalworking and manufacturing industries, ensuring precise and efficient surface grinding operations.