How to include a check box while using wice grid

Hello every one,
I am trying to implement the wice grid in my project.In that I want to
display check code is like the following

<%= grid(@users_grid,:table_html_attrs => {:class => 'grid_style', :id
=> 'accounts_grid'}, :header_tr_html_attrs => {:class =>
'grid_headers'}) do |g|
g.column :column_name => 'Login', :attribute_name => 'login' do




end -%>
how can I include a check box
<input type="checkbox">
I don't want check_box_tag

pls help.
Thanks in advance