Grizzly efb 401 patio cleaner is a practical joint brush to fight weeds in your own garden and around your house thanks to its high torque electric motor 400w 2800 rpm it is the ideal assistant for removing weeds and moss from joints the aluminium brush with plastic may be used for up to 2 hours on concrete slabs the line of sight device provides you with safe and precise working the adjustable and ergonomic second grip enables you to maintain a healthy posture when working with the joint