- Dumbbell bar: versatile tool for a wide range of dumbbell exercises to strengthen major muscle groups. - Barbell connector: connecting rod design prevents slipping during training and keeps the bar stable for safer workouts. - Barbell Extension Bar: helps you stay fit by strengthening the biceps and forearm muscles, increasing arm strength, control, and endurance. - Dumbbell bar joint: constructed from durable material for long life; screw fastener enables easy installation and removal. - Use scenario: perform daily home workouts using the dumbbell bar for presses, rows, and curls to build overall strength. - Use scenario: target arm development with the barbell extension bar to work on biceps and forearms, improving grip strength and control. - Use scenario: quick setup and secure assembly with the screw-fastened joint and barbell connector between sets, reducing downtime and enhancing safety.