GROCO Thru-Hull Installation Tool [THT-530] Sailing | Accessories eliminating the need for an

eliminating the need for an external GPS antenna in many installations

5" Round Bases (AMPs Hole Pattern)

AV-800 Four Pocket Flotation Vest - OD Green - Large to XL

a medium B-size double socket arm

175 Watts RMS

GROCO Thru-Hull Installation Tool [THT-530] Sailing | Accessories eliminating the need for anThru Hull Installation Tool Thru Hull Installation Tool The Concept: THT 530 makes the installation of standard GROCO thru hull fittings possible by a single installer. Slide the thru hull fitting, flanged end first, over the tool. (It will stop at the proper step.) Tie a length of monofilament to the eye and place it into the already cut hole in the hull of the boat. Apply caulking to the flange of the fitting, and pull the fitting through the hole