All I have to say is USE STOCK BODY CLIPS...I tried using the ones at Autozone and they broke the plastic slots on the door caps, POS. The clips are a tad expensive like $2 a piece but they'll stay put. I used the 'paint on the slots' method. The holes are 1/4" and I only drilled like 3-4 holes on each side. I didn't want to buy alot of clips and feel I didn't need that many. They look better I think in making the car 'buffer'. I had some stock skirts on there for awhile, but wanted to complete the look Alvin