5-in-1 Dumbbells - You only need the space of one set of dumbbells to enjoy five different weights. Compact and versatile—perfect for your home gym! 1 Sec Smooth Weight Adjustment - Featuring Keppi’s design, simply turn the handle with one hand to adjust the weight instantly. Enjoy a fast, smooth adjustment for higher training efficiency. Secure Locking System - Dual safety protection:base unlocking system and dial system work together.8 safety slots firmly lock the dumbbell plates for enhanced stability and safety. Non-Slip Handle - Ergonomic design with a special textured grip for anti-slip and sweat resistance, ensuring better control and comfort. Steel Dumbbell Plates - Cut from high-quality steel for superior strength and durability. Space-Saving Design - ideal for home, office, or gym use without taking up too much space.