Fitness equipment combination: The package includes a pair of 66-lb adjustable dumbbells with 8 5.5-lb plates, 4 2.75-lb plates, 4 1.1-lb plates, 4 collars and a dumbbell connector, which can connect two dumbbells to One barbell for different exercise routinesElectroplating adjustable dumbbell cover: Equipped with iron counterweight plate, with paint effect, can achieve maximum durability. Non-slip handle to ensure firmness and non-slip. It also includes a star-shaped lock ring for easy weight changeDumbbell connector: Using high-quality connectors, you can easily turn two dumbbells into one barbell. The handle of the connector is engraved with knurling, which can better grip and improve during exercise. Compatible with 1 inch rotating lock dumbbellExtended strength training: Our adjustable dumbbells with dumbbell connectors provide you with excellent versatility and interchangeability. Now you can quickly adjust your training level or easily switch between exercising dumbbells or barbellsEasy to use and store: it can be assembled and disassembled in seconds. Compact, convenient, easy to use and store. The all-in-one dumbbell eliminates the need for multiple dumbbells in the exercise space. Suitable for basic bodybuildingProduct name: dumbbellMaterial: SteelBarbell connecting rod length: 30cm / 12 inchesDumbbell bar length: 38 cm/15.2 inchesHole diameter: 2.5 cm / 1 inchGross weight: 44 Lb 1x 20kg dumbbell gift set