DESCRIPTION:Add these 1.5lb collars to your 2.0lb Knockout Plus Cores to build a fully adjustable dumbbell — no need to buy multiple weight sets. Slide a collar onto either end of your Egg Weight core to instantly change your load, so one set of cores can train at multiple weights. Sold as a set of 4, these 1.5lb collars deliver a bigger jump in resistance — ideal once you've outgrown the lighter collar options and want to push your training further. FEATURES: Set of 4 collars included Each collar weighs 1.5 lb Compatible with 2.0lb Knockout Plus Egg Weight Cores Slides on and off in seconds — no tools required Lets one core set double as multiple dumbbell weights Durable, high-density metal construction DETAILS: Package Contains: 4 Collars Weight: 1.5 lb per collar Compatible With: 2.0lb Knockout Plus Egg Weight Cores Material: High-Density Metal Warranty: Lifetime Warranty On High Density Metal