Viper introduces two slow-moving rotary drum crushing buckets: model VPH 21, a one-drum version for 20 to 30-ton excavators, and model VPV 22, a two-drum version for excavators larger than 30 tons in weight.

Viper crushing buckets are designed for crushing mixed waste materials, such as concrete (with or without steel bars), red/concrete bricks, tarmac, limestone, and soft materials such as wood or small fragmented materials.