This is a 4 hole ? hole punch, with a standard paper guide. It is fully metal and features a lock down handle for space saving storage. Weight is approx..1200g. The perforating capacity is 25 sheets of 80gsm, punch distance is 80x80x80 (4 hole), hole diameter is 5.5mm (standard), 10 year Manufacturers guarantee and bears the GS approval of product safety.