I got Hansgrohe to use in both my stall shower and my tub/shower. This is what you need for the handheld: (1) the handshower unit itself: (2) the slide bar: (3) the hose and (4) the wall outlet (this is what the water comes out of and connects to the hose with the other end of the hose connecting to the handshower unit. You can buy as a set, but for Hansgrohe at least, it won't include the wall outlet (which is cheap).

The above is in addition to whatever valve you need to divert the water away from the main shower head. That is all stuff that is in the wall--the bling on the outside is just the trim.

Hope this helps.

Why flame you? You're smart to be sure you understand it. If your fixtures are sold at either Faucetdepot.com or Faucetdirect.com they can tell you EVERYTHING you need. That's how I got all the pieces needed when we did our bathroom. Their customer service numbers are on their sites, call and speak with someone in their CS department, I was so surprised at how much they knew!

You've gotten some good info. I'm not sure if you want the hand held in place of the fixed wall shower head, or in addition to it. So I'll try to describe both.

Part One, you just want the handheld on a sliding bar:

If you just want the hand held and don't want the shower head that came with the D500058, then you need the Danze D469058 wall outlet.

You'll use a short brass nipple to attach the wall outlet to the copper fitting inside the wall. The same type of copper fitting that a typical shower arm would get threaded on to. The nipples are only $1-$2 at any box store. You can buy several of differing lengths (1-1/2" to 2" generally), use the one that fits, and return the others. The length needed depends on how deep the drop-ear fitting is buried in the wall plus how thick your tile backer board and tile are.

Brass nipple:
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1/2" Drop-ear fitting: Your copper tubing get soldered into the "smooth" opening, the shower arm of the shower head or your brass nipple for the wall outlet get threaded into the threaded end. Use teflon tape of teflon pipe dope on all threaded joints.

When you plumb it, have one port from your supply valve go to the tub spout, the other port that would normally feed the shower head will instead be plumbed to the Danze wall outlet.

Screw one end of the handheld hose to the wall outlet. Attach the other end of the hose to the handheld. Mount the wall bar on the wall. Attach the handheld to the wall bar.

Part two, you want the handheld in addition to the fixed shower head on the wall:

You'll still need the Danze D469058 wall outlet.

You'll also need a diverter valve. I took a quick look at Danze's offering and only see a 4-port diverter valve. All you actually need is a 3-port valve, but a 4-port can still work and allows you to stay in the Danze family. The Danze 4-port is actually designed to have one if its ports capped if you don't need all three outlet ports, the cap is even supplied with the valve, so they make it easy. If you want to go with a 3-port diverter, pick anything you like. I'll stick with Danze for the description:

You'll need the Danze D130000BT diverter valve and the Danze D560858T Parma trim kit to go with it.

The installation instructions that come with the diverter valve are pretty self explanatory. However...

Your hot and cold water supplies will feed the valve that came with the 500058 kit. That valve has two outlet port. One will go to the tub spout, the other now goes to the inlet of the diverter valve.

You'll use the supplied cap to cap one of the three outlet ports on the diverter. One of the uncapped ports will go to the fixed shower head. The other port will go to the Danze wall outlet which in turn will feed the handheld.

The Danze 4-port diverter affords you the opportunity to feed just the handheld, just the fixed shower head, or both simultaneously.

I got it!!!! Wow, thanks so much to all of you for your help. I should have come here in the first place and saved myself lots of frustration.

Great group of folks, you are. Thanks again!

I bought a slide bar as well for the handshower and in order to not have to get the seperate diverter valve I am going to run it from the shower arm and hang it on the slidebar. The diverter I purchased that goes on the shower arm doesn't stick up like most of them so it really won't be so visible. I almost bought the Danze (love the style) but it comes with a diverter on the trim piece so I'm not sure you could use that and then still get s seperate diverter valve so check that out first. When you buy a diverter valve it would have to be a three way one (tub, showerhead and handheld). Since the Danze already has a diverter on it for the tub/shower, I'm not sure you could use that. What I wound up with was the Danze showerhead and a Hansgrohe valve and trim which has a diverter on it. I was originally going to just use the slidebar and handheld shower but decided I wanted a normal showerhead too and I had already purchased the diverter valve which was only for the tub/shower so I had no option but to run it from the showerarm. I don't remember if the Danze Parma comes without that diverter on it. If it does then you could buy a seperate three way diverter. I'm sure that was clear as mud.

Mongo's post made everything crystal clear and he was right on the money. I called faucet direct and they verified everything he said (since I knew what questions to ask). (BTW, don't call Danze...they gave me all the wrong information and would have had me spend hundreds of unnecessary dollars). My plumber told me that the diverter on the tub/shower would now be useless and would just feed the tub. I think that's what Mongo said too.

Anyway, thanks to everyone (especially Mongo) for the plumbing lesson. Who would have thought????