The Overton's Bottom Mount Telescoping & Slide-In 3 Step Stainless Steel Swim Platform Ladder mounts under the boats swim platform. The telescoping ladder folds up and then inserts between the mounting brackets to secure it when not in use. Ladder steps extend down 31.25" below the swim platform. The ladder is 304 stainless-steel. Bottom Mount Telescopic Slide-In 450 LB Capacity Mounting Hardware Included | Overton's Slide-in 3 Step Telescopic Stainless Steel Swim Platform Ladder