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Ket Features
Heavy-duty die grinder flex shaft
high torque for sanding, polishing
Forward / reverse control
Controller + Foot Switch
Digital RPM display function
Safe and intuitive design for personal use
Handpiece Style
Chisel for HC-120
Choose options
Ket Features
Heavy-duty die grinder flex shaft
high torque for sanding, polishing
Forward / reverse control
Controller + Foot Switch
Digital RPM display function
Safe and intuitive design for personal use
Handpiece Style
Chisel for HC-120
Ket Features
Heavy-duty die grinder flex shaft
high torque for sanding, polishing
Forward / reverse control
Controller + Foot Switch
Digital RPM display function
Safe and intuitive design for personal use
Handpiece Style
Chisel for HC-120

GM150 Ultra
High Torque Grinding
Keep high torque at low RPM. Improve hand numbness and heating caused by excessive vibration from the handpiece.
GM150 Ultra
Extreme Labor-Saving Carving
Extreme labor-saving structure design reduces up to 70% of force compares to traditional hand carving.
GM150 Ultra Product Video

Built for Craftsmen, Loved by Beginners
Engineered for performance, designed for all levels.
Meets the Needs of Professional Craftsmen
The GM150 delivers the precision, torque, and versatility expected from a professional flex shaft grinder rotary tool and die grinder flex shaft.
Suitable for Novices & Ideal for Teaching
Lightweight and safe for new users, this variable speed flex shaft grinder is widely used in schools and studios. A perfect fit for workshops teaching wood, metal, and stone carving.
Versatility for All Users
High torque at low speeds ensures smooth carving, polishing, and sanding—even in reverse. Ideal for grinder with flex shaft use across multiple materials.
Smart Features for Precision Work
Equipped with digital RPM display, variable speed button, and a foot pedal for hands-free control. Records user settings—making it ideal for recurring polishing or flexible shaft sander routines.
Unleash Creativity on Any Material
From leather to EVA foam, wood, glass, or metal—the GM150 handles it all. Whether you're crafting or prototyping, it's the all-in-one flexible shaft polisher and carver rotary tool.
GM150 UT-Specification
Motor | DC 24V Brushless Motor |
Power | 250W |
RPM | 3,000~ 22,000 RPM |
Voltage | 100-240V/ 0.9~0.45A, 50-60Hz |
Flexible Shaft Grinder Handpiece Options
Upgrade your GM150 Ultra rotary tool with the right handpiece to match your workflow—whether you're carving wood, polishing soft metals, or shaping plastics. Choose between chuck or collet styles for optimal grip and bit compatibility.

HC-110 Chuck Style Handpiece
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Designed with grooved ergonomic grip for extended use
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Features a 3-jaw chuck for fast accessory changes (fits up to 4mm / 1/8” shank)
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Ideal for quick bit replacement during carving or grinding tasks
Included with GM150 Ultra (HC-110 version):
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Rotary Handpiece × 1
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Tool set for bit installation/removal × 1
HC-130 Collet Style Handpiece
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Supports multiple accessory sizes: 3mm, 6mm, 1/8”, 5/32", 1/4”
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Includes metric collet set for better bit stability during precision work
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Compatible with a wide range of carving and polishing burrs
Included with GM150 Ultra (HC-130 version):
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Rotary Handpiece × 1
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Tool set for bit installation/removal × 1
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Collet Set × 1(3mm, 6mm, 5/32", 1/8”, 1/4” each)
Tungsten Carbide Rotary Burr Set (Optional)
Boost cutting efficiency with our GM150 Ultra Standard Tungsten Carbide Burr Set—designed exclusively for flexible shaft grinder applications.
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Type: Double-cut rotary burrs
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Material: Tungsten Carbide
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Shank Size: 3mm
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Recommended For: Gold, silver, copper, aluminum, iron, and wood
Not compatible with CNC engravers. Bits for flex shaft grinders and CNC machines are not interchangeable.
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Type: Double cut Material: Tungsten Carbide Size: 3mm shank Suitable for carving on gold, silver, copper, aluminum, iron, and wood. |
Compatible Rotary Burr Brands
Use trusted third-party burrs to expand your GM150 Ultra’s potential:
Kutzall Rotary Burrs
Premium shaping and carving tools made with long-lasting tungsten carbide. Available in various shapes such as flame, sphere, and ball nose.
🔗 Kutzall Website
Saburrtooth Burrs
Perfect for wood and soft material carving, Saburrtooth offers aggressive, easy-to-clean rotary burrs ideal for power users.
🔗 Saburrtooth Website
Power Carving Made Effortless with GM150 Ultra Chisel Handpiece
Elevate your carving experience with the GM150 Ultra’s Reciprocating Power Chisel Handpiece. Its ergonomic grip and unique mechanical structure deliver double the output of traditional handpieces—reducing fatigue while enhancing precision.
Smart Design for Efficient Work
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Reciprocating action: 2× faster than standard chisel tools
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Comfortable ergonomic grip for extended use
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Recommended speed: 5,000–8,000 RPM (forward mode)
What’s in the Box
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1 × Reciprocating Chisel Handpiece
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1 × Wrench for blade maintenance
Precision Starts at the Edge. Crafted in Taiwan.
Add-ons Needed
No Add-ons Needed Only In Deluxe Bundle
IMCNC SKS3 Forge Series – Made in Taiwan
This chisel is forged with German O1 high-carbon steel—also known as SKS3—and enhanced with chromium and tungsten for superior toughness and edge retention. Designed for makers who demand more from every cut, built with the enduring spirit of craftsmanship.
Use Compatible Blades from Flexcut®
The GM150 Ultra is compatible with Flexcut®’s acclaimed Power Gouge Collection — a trusted choice among professional carvers worldwide.
🔗 Browse Flexcut Power Gouge Sets