Hmm ... It's impossible ;-) This RPM doesn't exist on any FTP server

Provides :
tcltklib.so()(64bit)
tkutil.so()(64bit)
ruby-tcltk
ruby-tcltk(x86-64)

Requires :

libc.so.6()(64bit)
libc.so.6(GLIBC_2.3.4)(64bit)
libc.so.6(GLIBC_2.2.5)(64bit)
ruby-libs = 1.8.7.352-7.el6_2
libtcl8.5.so()(64bit)
libcrypt.so.1()(64bit)
rtld(GNU_HASH)
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
librt.so.1()(64bit)
libtk8.5.so()(64bit)
libpthread.so.0()(64bit)
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(FileDigests) <= 4.6.0-1
libc.so.6(GLIBC_2.4)(64bit)
libm.so.6()(64bit)
libruby.so.1.8()(64bit)
rpmlib(PayloadIsXz) <= 5.2-1
libdl.so.2()(64bit)

Content of RPM :
/usr/lib/ruby/1.8/multi-tk.rb
/usr/lib/ruby/1.8/remote-tk.rb
/usr/lib/ruby/1.8/tcltk.rb
/usr/lib/ruby/1.8/tk
/usr/lib/ruby/1.8/tk.rb
/usr/lib/ruby/1.8/tk/after.rb
/usr/lib/ruby/1.8/tk/autoload.rb
/usr/lib/ruby/1.8/tk/bgerror.rb
/usr/lib/ruby/1.8/tk/bindtag.rb
/usr/lib/ruby/1.8/tk/busy.rb
/usr/lib/ruby/1.8/tk/button.rb
/usr/lib/ruby/1.8/tk/canvas.rb
/usr/lib/ruby/1.8/tk/canvastag.rb
/usr/lib/ruby/1.8/tk/checkbutton.rb
/usr/lib/ruby/1.8/tk/clipboard.rb
/usr/lib/ruby/1.8/tk/clock.rb
/usr/lib/ruby/1.8/tk/composite.rb
/usr/lib/ruby/1.8/tk/console.rb
/usr/lib/ruby/1.8/tk/dialog.rb
/usr/lib/ruby/1.8/tk/encodedstr.rb
/usr/lib/ruby/1.8/tk/entry.rb
/usr/lib/ruby/1.8/tk/event.rb
/usr/lib/ruby/1.8/tk/font.rb
/usr/lib/ruby/1.8/tk/fontchooser.rb
/usr/lib/ruby/1.8/tk/frame.rb
/usr/lib/ruby/1.8/tk/grid.rb
/usr/lib/ruby/1.8/tk/image.rb
/usr/lib/ruby/1.8/tk/itemconfig.rb
/usr/lib/ruby/1.8/tk/itemfont.rb
/usr/lib/ruby/1.8/tk/kinput.rb
There is 1081 files more in these RPM.