Use this smaller 4" roller and handle for railings and hard to reach areas. The 4" roller also works great on deck boards, the smaller roller does not overlap deck boards so less material falls in between the boards. Also included is a 9" roller screen to insert into bucket(bucket not included)to easily remove excess material from roller. We recommend you purchase a combination of this package and the 9" rollers. Additional 4" rollers are available for separate purchase.