Knee scooter for adults Function: Ideal knee scooters for foot injuries adult : surgery to the foot, ankle or lower leg as well as below the knee amputees.The BlessReach knee walker is an excellent alternative to crutches. Safety and stability: The scientific double tube structure is stronger and can provide better support. Use more comfortable 8-inch wheels, easy to maneuver. Ergonomic adjustable locking handbrake for better safety.