This 25cm The Classics ruler can be clipped into a notebook and used as a three-hole punch. No more digging through your desk or backpack when you have one of these all-in-one dynamos. Durable and portable, this is an essential item for any student, young or old. They are an economical solution to fulfil a big need. Every student needs a ruler and a hole punch during their school day - grab one today. The Classics school, office and art supplies are useful, high quality items that are great for school, home and offices. They are available in assortments of bright, vibrant colours and integrate both new unique ideas with traditional must haves.