Manufactured from durable powder coated strong tubular steel The 3 & 4 tread units are mobile on 75mm spring loaded castors that easily glide across floors & engage or disengage depending on whether or not weight is applied The 5 to 8 tread models incorporate tilt & push handles which make these steps manoeuvrable Punched steel treads (200D x 550Wmm) & platforms (400dD x 550Wmm) ensure secure grip Kick board to support the users safety Box section base gives extra strength 7 stability