Specifications: This durable flexible shaft is quick to connect and easy to operate, which is the perfect addition for your rotary tool. The ergonomic handle is non-slip and comfortable to grip, ensuring high efficiency and stable performance. It is widely suitable for dust removing, fine carving, grinding, polishing, sanding, etc. Black Model: Item Name: M19*2 Thread Flexible Shaft Material: Alloy, Steel Screw Interface: M19*2 Applicable Electric Grinder: for 17.5mm Thread Outer Diameter Electric Grinder Feature: Sturdy, Durable, Wide Application, Simple Installation Handle Size: 0.3mm - 3.2mm/0.01" - 0.13" (Approx.) Total Length: 1m/39.37" (Approx.) White Model: Item Name: 6mm Chuck Flexible Shaft Material: Alloy, Steel Applicable Electric Grinder: for 6mm Shank Diameter Electric Grinder Feature: Lightweight, Convenient, Easy to Use, Perfect Accessory Handle Size: 110mm x 20mm/4.33" x 0.79" (Approx.) Chuck Clamping Range: 0.3mm - 3.2mm/0.01" - 0.13" (Approx.) Chuck Thread: 8mm x 0.75mm/0.31" x 0.03" (Approx.) Total Length: 1m/39.37" (Approx.) Notes: It cannot be used for high-strength grinding and polishing, the blade diameter cannot exceed 8mm, and the machine must be adjusted to the lowest level. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Flexible Shaft (Others Not Included)