Debinmi, We live in an older home that has those really wide entries between rooms with the decorative woodwork. So, I used a 2x6 (and stained it to match the existing woodwork), because I wanted it to be the same width as the wood framing that was already there. I don't have a separate workout space, so I needed it be not as much as an eyesore as possible - although, there's not much I can do to make the anchors look like part of my room decor. lol If you're not trying to make it fit into an environment, I'd go with a 2x4. I used 3 inch deck screws and pre-drilled my holes, because I was going into hardwood (my home's woodwork). I didn't have to find studs or mess around with drywall or anything like that. I considered using shorter screws, but my husband is big, lifts heavy, and uses a lot stronger tubing and bands than I do, so better safe than sorry. For wood, patching it if I ever remove the board will be the same wood putty process regardless of the depth of the drill hole.
Terina, I had huge (think they are called eye-bolts?) on hand. I got them at the hardware store years ago and had some left-over. They work fine, and I saved a few bucks, but honestly... the loop part of them is only about an inch in diameter. My fingers don't work real well in the a.m. (getting older) and I feel that it wastes a bit more time than necessary each time I have to put a band through them. So, when I get a chance, I'm going to change them out for something else. I haven't done enough research on the options yet to decide what I'm going to go with yet. I need anchors that are more efficient (for cranky finger joints that don't want to cooperate) than what I have now, while being durable and safe for my husband's weight (he actually does a few TX or TRX or something like that exercises on it), so it has to be able to hold the majority of his body weight. So, if anybody that's happy with their anchors wants to make suggestions... I'm all ears. Love it when Members share, because it saves me having to do the research myself. Yeah, I know, sounds pretty lazy on my part. lol Christosz, after you've had a chance to use yours, can you let us know if you're happy with them, what brand, etc.?