We have just installed Latte metal perfect fit venetian blinds to a back window. The advantage of perfect fit blinds is that no holes need to be drilled into the window. You also gain by not window sill space by not have blinds sitting on the sill.
These blinds operate by holding tabs at the bottom of the blind to left the blind up and by using a wand control for tilting the slats. This makes the perfect fit blinds a great choice for child safety as no strings hang down.