screw holds each fitting in position. There may be marks on the device to identify standard hole positions. There may be positions where a punch head will not make contact with the activating handle, allowing holes to be "turned off". Some punch designs use hollow punch heads (a thin-walled tube), with the edge a sharpened blade. This allows the chads to be pushed up and out the top, as the paper is being cut, making it more suitable for thicker volumes of paper. For very large amounts of paper, a paper drill may be used instead of a punch. Applications Single-hole punches A single-hole punch makes a single hole per activation, usually at an arbitrary position (i.e., without alignment guides). Single-hole punches are often used to punch an admission ticket or other document to indicate it has been used or processed. A specialized ticket punch may be used for this purpose. Some ticket punches have a longer reach/depth (allowing for a particular spot on the ticket to be punched), or punch a particular shape instead of a round hole. Single-hole punches are often used to punch holes through old playing cards at casinos, marking them as "used" or "canceled". This helps cut down on cheating by eliminating any cards that may have been tainted by players. Single-hole punches are widely used in the British Civil Service where papers are punched with a single hole in the upper left, and secured using a treasury tag. Single-hole punches can also be used for binding, with a single loose binding ring, although this is much less common than with ring binders. Single-hole punches can also be used to make confetti for scrapbooks and other crafting. Eyelet punch A related office tool is the eyelet punch. This is a single-hole punch which also crimps a metal fastening loop around the hole, similar to a rivet. It is used to permanently secure a few sheets of paper together. A similar tool, generally known as a holing pincer, is used in animal husbandry. A common application is to attach an ear tag to a livestock animal. Paper tape repair punch Specialized hand-operated tape punches were used to perform small edits and repairs on punched paper tapes used for data entry into teletypes or early computers. Torn or damaged tapes were sometimes aligned with specialized jigs, spliced with special adhesive tape, and the holes encoding data were