Why should I consider a magnetic dipstick over the stock dipstick? Like the magnet on the drain plug of several models of automobiles, a magnetic dipstick will pull any ferrous metallic fines from normal engine use that are in the oil. Since these small engines do not have an oil filter, this will help extend the life of the engine. This will help protect your investment while maintaining the functionality of OEM. The high temperature super magnet is partially recessed inside the dipstick and secured with an oil tolerant, high strength (4500 PSI), high temperature retaining compound. 1. A hexagonal body vs. round body Why is this version hexagonal instead of round? A round piece is difficult to grip, especially when any oil gets on it. A knurled surface is difficult to clean. A hex allows for easier gripping with fingers (or if needed, a wrench). The flat surfaces are also easy to clean. 2. Type 2 anodization vs. bare aluminum Why is this version anodized? Type 2 Anodization will greatly reduce or eliminate the chance of the threads galling or freezing together (versus bare aluminum), allowing for trouble free and damage free removal. The durable red color signifies use with the Predator unit and also protects the aluminum. 3. A flat O-ring vs. round O-ring Why is a flat O-ring used? The dipstick is CNC machined from 6061 aluminum to high quality standards.