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【Multi-Purpose Rotary Tool】Katerk rotary tool kit - the ultimate DIY starter set. Perfect for cutting, sanding, watch polishing, wood carving, dog nail grinding, jewelry drilling, sharpening, engraving and grout removal. NOTE: Tighten the collet nut securely with a wrench as instructed 【Power Motor & 6-Speed Variable】This rotary tool features an enhanced motor(28000 RPM max), delivering 30% more power than standard rotary tools. With adjustable 1-6 speed settings (8,000-28,000 RPM), it excels in high-precision applications 【High-Capacity Battery & Fast Charging】Equipped with a 4000mAh rechargeable battery, this engraving pen offers 100% longer runtime than standard 2000mAh rotary tools. Type-C fast charging works with various USB sources for seamless use anywhere 【Digital Gear and Power Display】The cordless rotary tool has a digital screen that clearly displays real-time speed settings and battery status. Pre-operation speed adjustment ensures optimal setup. Detects low power in time to prevent shutdowns 【Intelligent Memory Function】The innovative auto-memory function maintains your selected speed during short breaks (<5 mins), with intelligent auto-reset to default speed 3 when idle for extended periods (5+ mins), enhancing both convenience and safety 【Package】Cordless rotary tool, charging cable and 70pcs rotary tool accessories, like sanding bands, cutting discs, grinding wheels, drill bit, diamond bits, etc. The 1/8" chuck fits Dremel tool and others. Ideal for metal, wood, glass, plastic and more 【Anti-Block System】Engineered with an auto-engaging safety lock positioned at the engraver tool's front end, this engraving pen activates immediately upon power-up and physically blocks the shaft lock button. Prevents accidental stops during your crafting