Solid One-Piece Cast Iron Kettlebell/Crossfit, Strength Training & Conditioning Equipment One-piece construction with no seam under the handle Great thickness to the handles. Wide enough for two-arm movements (swings), but perfect for single arm movements too One-piece casting. Bottoms ground flat for renegade rows, KB handstands, and more! Color-coded bands on weights to easily differentiate. Clearly marked with kilogram and pound sizing.