Item Name: Mill Engraving Extension Cord Rubber Hose Flexible Shaft Drill Grinder. Using a flexible drive enables you to take your power tool to the most inaccessible places.It may be used with polishing kits, drill bits, wire brushes, countersinks, flap wheels, mounted - stones and grinding wheels.Great for intricate work.Fit directly into the chuck of any cordless or electric power drill.Inner Core Diameter: 3.7mm,Chuck Diameter: 8mmMaterial: Metal, Titanium-plated Spring,RubberColor: Black & GoldLength: 98cmInner Core Diameter: 4mmChuck Diameter: 8mm Package Includes: 1 x Flexible Note:The color may have different as the difference display, please understand.Please allow 1-3mm error due to hand test. *Please make