by Mandrake » Feb 6th, '12, 19:33
If you want to put holes in several cards at the same time, a Forstner bit in an electric drill might be more efficient. Clamp the packet tightly - masking tape is excellent for this purpose and can be removed very easily. Put the packet onto a wad of newspaper or an old phone directory or mail order catalogue and drill slowly until you're fully through the cards. Forstner bits are sold at B&Q, Aldi and local hardware stores either singly or in boxes of 5 or 6 different sizes.