Features: Connect with rotary tools, make work handy and portable. Advanced handle: Reduces vibration to prevent fatigue and gives a better grip for greater maneuverability & high speed Wide application: Apply to polishing, engraving, drilling, cutting, grinding, carving, shaping and sanding when flex shaft works with straight die grinder. High working efficiency, not easy to heat. flexible and endurable Excellent Gift for DIY Enthusiasts, simple to use and make the job easier, safe and reliable. Specification: Handle Material: aluminum alloy Connecting rod diameter: 6MM Chuck size: 0.5-6mm Grip handle diameter: 26MM Maximum speed: 10000 RPM Flex shaft length: approx.100cm Total length: approx.110cm Weight: Approx.592g/20.9oz Instructions: 1. It is better to install the machine before using the flex shaft. After idling for 15 minutes at a low speed, it will be used.Starting to use 1-2 hours will have a little heat, is normal wear period 2. Try to stretch the tube straight when it's on working, which can extend the service life of the flexible shaft 3. Slight heating on the electric drill does not affect the operation 4. The chuck head can only be used at a slow speed. The speed is controlled within 8000 revolutions. Package list: 1 x Flexible Shaft 1 x Handpiece 1 x Chuck Key 1 x wrench