The Saeshin Strong 210 / H400 40K Set is a professional electric nail drill designed for technicians who need higher speed, stronger torque, and a dependable corded setup for daily salon work. The exact set is sold as STRONG 210/H400 40,000 RPM SET (3/32"), pairing the Strong 210 control box with the H400 handpiece.

Key Features

• Up to 40,000 RPM
• H400 handpiece included
• 3/32" / 2.35 mm bit compatibility
• High torque H400 handpiece
• Foot and hand control
• Forward / reverse function
• Compact Strong 210 control unit
• Professional Korean-made system

Why It Works Well for Professional Use

This model is a strong fit for nail technicians who want more power than standard 30K systems, especially for removal, shaping, and more demanding manicure or pedicure work. Product pages for the set emphasize 40,000 RPM performance and position the H400 as a durable, high-torque handpiece for precision-driven professional tasks.

H400 Handpiece

The H400 handpiece is the main performance upgrade in this set. Multiple product sources list it at 40,000 RPM with 4.0 N·cm torque, 159–159.5 mm length, and about 233 g without cord, with compatibility for standard 2.35 mm / 3/32" bits.

Technical Specifications

• Product type: Professional electric nail drill
• Model: Strong 210 / H400
• Speed: up to 40,000 RPM
• Handpiece torque: 4.0 N·cm
• Bit size compatibility: 2.35 mm / 3/32"
• Handpiece length: about 159–159.5 mm
• Handpiece weight: about 233 g
• Control features: forward/reverse, hand and foot control
• Country of origin: Korea

Best For

This set is best for nail technicians who want a higher-torque salon e-file for manicure, pedicure, and product removal, while keeping the familiar Strong 210 control box format.

Important Note

When switching between forward and reverse, the motor should come to a complete stop first to avoid control issues. This warning is also present in the product text you provided.