Why are my tools held backwards?

So I have been making some tools for my game and two of them appear to be held backwards. I have tried rotating the handle and the tools but it doesn't work. I have tried this code:

rarm_weld = Instance.new("Weld")
function onEquipped(mouse)
	local rarm = script.Parent.Parent["Right Arm"]
	local torso = script.Parent.Parent["Torso"]
	rarm_weld.Parent = rarm
	rarm_weld.Part0 = rarm
	rarm_weld.Part1 = torso
	rarm_weld.C0 = CFrame.new(-1.5, 0.5, 0.5) * CFrame.Angles(-1.6, 0, 0)
end
script.Parent.Equipped:connect(onEquipped)
function onUnequipped(mouse)
	rarm_weld.C0 = CFrame.new(-1.5, 0, 0)
	rarm_weld:remove()
end
script.Parent.Unequipped:connect(onUnequipped)

that seems to help when you select the tool but when you re select the tool your arm rips off and falls through the ground. (yes, very funny) I'm not quite sure what to do about it. I am wondering if there is a way to fix this script or do something to the tool. When I mean the tool is held backwards I don't mean that the tool is backwards I mean the arm is backwards and the tool is upside down. (painful!) I would appreciate the help allot!

Sincerely, crazycittykat

EDIT

I have a place with the tools in it. The canopy and wall are the broken ones.http://www.roblox.com/Plugin-Studio-and-Tool-Workshop-place?id=215250479

rarm_weld.C0 = CFrame.new(-1.5, 0.5, 0.5) * CFrame.Angles(-1.6, 0, 0)

You have this rotating the the tool by -1.6 radians. Try removing the * CFrame.Angles(-1.6, 0, 0)

Well I figured it out on my own. :l It has something to do with mass and I had to split up the parts. I don't know why but its fixed.

Forget the scripts... just get the plugin, its so much easier

http://www.roblox.com/Tool-grip-editor-item?id=153352998

Also, the way the Handle part is positioned an also affect the way the tool faces