Design - Double head design with self-adjusting depth; the clamped fixed screw auto-locks to reduce looseness during operation - 1/4 inch shank with a metal filter to prevent burrs and foreign objects from entering the air intake and damaging the machine Features - Smooth chamfering with no ripple - Quiet operation with no noise and no heating after prolonged use - Stable performance and long service life Lightweight and durable - Up to 30,000 rpm speed; depth range 0.1 to 1.5 - Compact, small, and easy to handle with one hand for right-side fillets - Five gears for adjustable speed to suit the task and extend blade life Blade replacement - Loosen the plum screw with a hex key, remove the baffle plate, remove the blade screw with a ring wrench, remove the old blade and replace with a new one Applications - Deburring and chamfering edges on wood, plastic, or aluminum parts - Finishing small fillets on hobby models, electronics housings, or precision components - Precision edge rounding on small mechanical parts and enclosures