Yeah...The stock metal fenders that come with the bikes tend to have the hardware fasteners, (nuts and bolts, and/or what they attach to), break off and then the fenders wind up flipping into the wheel and in the process wrecking the bike and yourself, not to mention what you might hit along the way...I like having fenders myself and this is the safe option i have chosen.
These are cheap to get, look good, come in different colours, and if for some reson they detach, they are plastic and would just fly away...Mine have stayed firmly attached as i use blue locktite as well to hold things together and have taken to the road and speed quite well...DAMIEN
Below is the website to order them from, as well as my before and after pics, when i changed out those stock metal fenders, at the same time i converted my bike from coaster and front rim brake and spoke wheels, to rear and front disk brakes with mag wheels...DAMIEN
Amazon.com : BlueSunshine Adjustable Road Mountain Bike Bicycle Cycling Tire Front/Rear Mud Guards Mudguard Fenders Set (Red + Black) : Sports & Outdoors
www.amazon.com