An Orange Series Micromotor Push-Button Handpiece (often referring to low-speed contra-angle attachments from manufacturers like is a low-speed, high-torque rotary attachment designed for dental micromotors. It uses an integrated push-button cap to release and secure burs instantly.

Key Specifications & Features

Push-Button Chuck System: Allows quick, tool-free bur insertion and removal by pressing the back cap of the handpiece head, eliminating the need for a manual latch mechanism.

Universal E-Type Connection: Built to ISO standard specifications, allowing seamless mounting onto standard air or electric low-speed micromotor bases.

Low-Speed, High-Torque Performance: Operates typically in the 15,000 to 35,000 RPM range, delivering controlled cutting and polishing power.

Ergonomic Design: Features an orange-accented grip body, lightweight construction, and balanced weight distribution to reduce hand fatigue during extended procedures.

Latch-Type (RA) Bur Compatibility: Accepts standard Right-Angle/Latch-Type burs (\approx 2.35\text{ mm}shank diameter) used in low-speed operations.

Autoclavable: Fully sterilizable at standard temperatures up to 135^\circ\text{C} (275^\circ\text{F}) for cross-infection prevention.

Primary Clinical Uses

Caries Removal & Cavity Preparation: Refining decay in deep dentin where precise control is required.

Polishing & Prophylaxis: Driving rubber cups, brushes, or felt points for prophylaxis and post-restoration composite polishing.

Endodontic & Prosthetic Adjustments: Excavating root canals or trimming temporary crowns and chairside restorations. 

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