The true-running rotary connection for precision finishing and detailing. A micromotor handpiece is only as accurate as the mandrel mounted in its collet. Cheaply stamped mandrels vibrate and wobble at high speeds, destroying delicate settings and leaving chatter marks on the metal. Manufactured to strict tolerances, Biso Precision Mandrels ensure perfect concentricity. Featuring the jewelry-industry standard 2.35mm (3/32") shank, these mandrels securely hold unmounted polishing discs, silicone wheels, and custom abrasive strips, allowing you to execute flawless detail work inside rings and intricate channels.
Advantages
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True-Running Precision: Machined from hardened steel to exact tolerances. These mandrels will not bend or warp under normal bench pressure, ensuring your polishing wheels spin dead-center without destructive high-speed vibration.
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Universal 2.35mm Shank: The 2.35mm (3/32") shank diameter is the strict global standard for rotary handpieces. It is universally compatible with Foredom, Marathon, Saeshin, RAM, and Dremel professional collets.
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Non-Slip Grip: The screw-top variants feature broad-headed screws and reinforced washers to distribute pressure evenly, preventing unmounted discs from slipping or spinning freely under heavy torque.
