Garelick Pontoon Swim LadderFeatures: For use at pontoon side gate or transom; Attaches easily to deck with included Shur-loc catches (76000); Vinyl sleeves on verticals protect pontoon; Hooks fold flat for stowage; Durable 1" (3cm) diameter Anodized aluminum tube.; Comfortable white traction molded poly steps.; Shur-loc catch brackets (76000) allow for permanent or removable mounting.; Dimensions: 3 step, L 36" (91cm), W 15" (38cm) ; 4 step, L 50" (127cm), W 15" (38cm); Mounting InstructionsHOW TO MOUNT GARELICK PONTOON SWIM LADDERMounting Instructions: This ladder was designed to be mounted on the pontoon at the side gate.; Slip ladder catches onto ends of both ladder hooks. Position and mark four mounting holes on boat deck.; Secure ladder catches in position by drilling eight holes with a 9/64" drill bit and using screws. Note: Larger opening must face away from ladder and rubber gasket must be inside catch for proper operation.; ; Attach ladder to boat by inserting hooks of ladder into large opening of catch slot. Slide ladder down. Make certain that ladder hangs perpendicular to water surface.; Vinyl sleeves between first and second step on verticals are intended to abut pontoon and cushion ladder.; ; To remove ladder, slide up and then pull out of catch. Hooks fold flat for easy stowage.; Safety: Do not use ladder when the boat's motor is running.; Information sourced from Garelick Mounting Instructions for Swimming Ladder Model 15240Installation Instructions