The Double Post Punch punches approximately 3/4 inch from edge of paper. The holes are approximately 1 inch apart. The hole diameter is 1/16 inch. Recommended use. -Use with cardstock up to 80 lb weight.(Normal business card thickness) -Punch one card at a time. - ***********************MANUFACTURERS-REPLACEMENT POLICY: There is a 1 year replacement for punches. If replacement within 30 days contact Amazon.Otherwise contact manufacturer. Please read use/care on blister card for instructions before use. This product is "Protected by US Pat No. 8,763,503." AND "Protected by US Patent No. RE46,627 E". Create earring cards easy. Punches holes evenly every time. Display your post earrings, fish hook earrings, french wires. Display single beads or pendants-just add wire! Easily create your own brand- can be used with business cards, cardstock even greeting cards.-------------------1 year "No Fuss" Replacement warranty.