The Tigress XD Outrigger Bay Series Top Mount is designed for use on sport fishing boats up to 40'. It accepts all Tigress XD 1-1/8" butt diameter outriggers.• For use on sport fishing boats up to 40'.• Accepts all Tigress XD 1-1/8" butt diameter outriggers.• 19 upper-arm angle/locking (at 10°) using Tigress XD 316L stainless steel tooth locking design with horizontal stops for trailering and bridges.• Large 3-lobe UV ergonomic knob for changing and locking the outrigger's elevation.• 24 adjustable/locking system positions (15° increments) featuring Tigress XD 316L stainless steel locking design with HD spring return.• User-friendly side operating lever.• Large 'XD' aluminum 14.5mm thick baseplate with four corner mounting.• 5/16" through x 3.000" x 5.000" 4-bolt pattern.• Fits Tigress and other industry standard 4" x 6" mounting plates (four 5/16"diameter fasteners).• Extreme-duty 316L stainless steel and anodized aluminum fully sealedconstruction with UV protection.• Ambidextrous mounting option to accommodate the side that the tri-lobe knobis positioned on.• 3-year limited warranty. Large 3-lobe UV ergonomic knob for changing outrigger's elevation 24 adjustable/locking system positions at 15° increments Extreme-duty 316L stainless steel & anodized aluminum fully sealed construction