• Can be installed and removed from your doorway in 5 seconds • Multi-functional design allows the unit to be used for chin ups, sit ups and push up exercise • Foam padded hand grips for added comfort • Supports up to 300 lbs Door size requirements: • molding around door: minimum 1 1/2", maximum 3 1/2" • molding distance from wall: minimum 1/4", maximum 3/4" • wall thickness (trim to trim): minimum 4 1/4", maximum 6 1/4"