The Kong anchor connector is made of high quality stainless steel AISI 316. Kong Stainless steel swivel anchor connector features: The swivel anchor connector is great for reducing chain twist when trying to bring an anchor to the surface Allows the anchor to swivel independently and the connector to ride smoothly over the bow roller Designed to go over bow rollers and pass through hawse pipes without snagging Sleek, slim, snag-free profile Kong Stainless steel fixed anchor connector features: Slim profile Non-swivelling Snag-free passage over bow rollers and through hawsepipes Type Kong Chain Size Jaw Width on Anchor End Kong Break Load Straight Kong Safe Working Load Lateral Compatibility 6 - 8 mm Swivel 6-8mm 16mm 2500kg 850kg 6mm,7mm 6 - 8 mm Fixed 6-8mm - 2500kg 850kg 6mm, 7mm 8-12 mm Swivel 8-12mm 5000kg 2000kg 8mm, 10mm 8-12 mm Fixed 8-12mm - 5000kg 2000kg 8mm, 10mm Kong Chain Size = the chain sizes that fit on the chain end, not the anchor endMBL = Manufacturer (Kong) straight Break LoadMWL = Manufacturer (Kong) lateral Safe Working LoadCompatibility = reasonable compatibility with Grade 40 chain break load