3 ft. White Snap-In Filter Gutter Guard

Yes it snaps to front lip of gutter.

Curve it up, so the water runs off.

I agree, it does not fit the 'K" style and it is frustrating when I had to double check to see if I really knew what 'K' style was. Anyway, I ended up using them. I tucked the flat end up under the shingles as most go in. I then found that the the forward end that should snap into the 'K" gutter still fit snug between the gutter nails and the inside lip of the gutter. Being plastic and easy to trim, it was easy to have a 3" overlap. Several storms later it's all still there and sheds the leaves perfectly! This is false advertising but the fact it's inexpensive gives you the option to experiment with a few.

Yes. I used small screws to secure it to the vinyl gutters. Predrill holes through filters to gutters. Worked great.

You would not use it. I believe it is designed to go under shingles.

I believe you can purchase them separatly

It is a good product. Easy install. Will last about 5 years or so before the top material wears out. Remove and replace with new. It kept the gutters very clean. There is some maintenance but it is small. My Mom has the expensive gutter guards installed. These work as well as hers for a fraction of the price. Maintaining them is the same.

Get a pair shears..cut it off..

I was sold 52 individual pieces. if you buy ask for case singly a pain to handle

No, just butt them Together.