The Pro-Graad 933 Unitized Wheel Mandrel (2 Pack) is designed to securely attach 2" – 4" diameter unitized wheels to rotary tools, such as die grinders. This mandrel offers a versatile fit, accommodating wheels with thicknesses of 1/4", 1/2", 3/4", or 1", featuring a 1/4" center hole (wheels sold separately). Its washer flanges, with a 1.25" outside diameter, ensures stability for working on small or intricate workpieces. With a 2.3" overall length and 1.25" diameter flanges, this mandrel holds the wheel firmly in place, allowing for smooth edge deburring and finishing applications. The mandrel supports a maximum speed of 14,000 RPM, ensuring high-speed performance for demanding tasks. It is designed to fit a rotary tool with a ¼” collet, making it a reliable choice for various applications. For mounting unitized wheels with a density of 6 or higher, a 5/16" wheel center hole is recommended. The Pro-Graad 933 Mandrel offers durability, precision, and efficiency, making it an essential accessory for anyone working with unitized or buffing polishing wheels in detailed finishing tasks.