Examples in these listings show hole diameters such as 3 mm and 1/4 inch (quarter‑inch). The quarter‑inch size is commonly used for standard badge rings and binder hardware.
Many models highlight soft or rubber hand grips, ergonomic or cushioned handles, and designs intended to reduce hand strain during repetitive use. Look for these features if you’ll be punching frequently.
Several handheld punchers include built‑in waste holders or easy‑empty chip compartments/receptacles to collect scraps and reduce mess. Check product listings for a removable or lockable waste tray if containment is important.
A quarter‑inch (1/4") hole is noted as a good fit for most standard badge rings and common binder/folder hardware. Examples in these listings reference the 1/4" size for that purpose.
Some models advertise reduced‑effort squeeze mechanisms, anti‑jam designs, and locking handles for compact storage, plus soft grips to improve comfort. Look for those features in listings if you want easier, more reliable punching.