3 hole punch heavy duty

Listings most often report metal construction—frequently described as hardened or heat-treated steel (for example, 'Made of heat-treated 45# steel' or 'Material: Hardened Steel').

Capacities vary widely: some desktop models list around 10 sheets, while heavier-duty units advertise punching up to about 160 sheets.

Many listings include built-in or removable waste chip/trays to collect paper scraps. Other common features are non-skid rubber bases and paper guides for stability and alignment.

Warranty coverage varies across listings: some state a limited lifetime warranty, others list a 7-year warranty, and at least one notes 'No Applicable Warranty.'

Adjustability varies by model. Some listings advertise the ability to switch between 2- and 3-hole punching and reference 9/32-inch spacing, while others are described more generally as adjustable 3-ring punches.

Some listings specify paper weight when stating capacity (for example, '10 sheets of 20-pound premium quality paper'), while others state capacity only as a sheet count (for example, 'up to 160 sheets').

At least one listing mentions an antimicrobial agent on the punch surface to reduce bacterial growth; others list non-skid rubber bases for desktop stability.