The dumbbell set has a total weight of 66 pounds and includes eight 5.5-pound plates, eight 2.75-pound plates, two handles, four lock collars and a connecting option for converting dumbbells to barbells. You can freely adjust the weight of the dumbbells to meet your different needs.

• You can use the connecting nut to switch the barbell and dumbbell 
• The exterior of the weight plate is made of hdpe and the interior is made of concrete
• Dumbbell bar with electroplating process is not easy to rust
• Ergonomically designed handle for a comfortable grip during exercise
• 4 threaded collars fix the dumbbell firmly to ensure that it does not shake or fall
• Dumbbells can be stored in the corners of the house without taking up too much space
• The dumbbell set weighs a total of 66 pounds and is suitable for home and office use

• Color: Black
• Material: Hdpe, concrete, iron pipe 
• Dumbbell size: 19.5" x 8" x 8" (L x W x H) 
• Barbell size: 39.5" x 8" x 8" L x W x H) 
• Net weight: 70 lbs
• Package includes: 8 x 5.5 lbs weight plate
• 8 x 2.75 lbs weight plate
• 2 x Dumbbell bar
• 4 x Lock collar
• 1 x Connecting nut
• 1 x User's manual