Providing a watertight access point without the use of tools, this Twist ‘N' Lock Deck Plate with cam-action watertight O-ring ensures a reliable seal while still allowing easy removal for visual inspection. Suitable for hole sizes up to 4-1/2 inches in diameter. Requires six #8 fasteners. Seachoice is committed to delivering quality marine accessories and OEM replacement parts to satisfy fishing, boating and watersports enthusiasts worldwide. Seachoice is run for and by boaters offering a wide-ranging product line while remaining affordable.