How to make this part perfect in players hand?

Hey fellow ScriptingHelpers users, Im making a Piggy style game and Im making it to hold only one item per person and this is my keycard script (All others keys are perfect with same script but with different math) and no, ffs not making those parts tools as it would break the "concept" of the game.

local key = script.Parent

script.Parent.ClickDetector.MouseClick:Connect(function(player)
    local char = player.Character

    if char:FindFirstChild("Chave") then
        local oldKey = char:FindFirstChild("Chave")
        oldKey.Parent = workspace
        oldKey.WeldConstraint:Destroy()
        oldKey.CFrame = key.CFrame * CFrame.Angles(0,math.rad(45),0)
        oldKey.CanCollide = true
    end 

    if char:FindFirstChild("Martelo") then
        local oldKey = char:FindFirstChild("Martelo")
        oldKey.Parent = workspace
        oldKey.WeldConstraint:Destroy()
        oldKey.CFrame = key.CFrame * CFrame.Angles(0,math.rad(45),0)
        oldKey.CanCollide = true
    end 

    key.Parent = char
    key.CFrame = char.RightHand.CFrame *  CFrame.Angles(math.rad(180), math.rad(22.427), math.rad(-232.931)) --The math it uses

    local weld = Instance.new("WeldConstraint")
    weld.Parent = key
    weld.Part0 = key
    weld.Part1 = char.RightHand
    key.CanCollide = false
end)

Screenshot: http://pays.host/uploads/b0425be8-fb89-4d7b-a116-2fc30390e660/mGivtSmT.png The problem is the commented line, I would be SO much appreaciated if someone helped me, thanks!