How tall of stack of paper can it cut cleanly?

I would agree that about 1" is the most. I would also add that it requires a significant amount of pressure pressed down on the paper before making the cut in. Meaning, it's important to hold the paper steady (as if held by a clamp) while pressing down to cut, because if you don't, the paper can move and not get a full cut from top to bottom. This is especially true with thinner paper. If you are just starting out using this machine. I would recommend starting with 1/4" stacks of scrap paper and get a feel for it before attempting to cut important paper in full 1" stacks. Also, make sure the two adjustable guides are aligned properly, sometimes these need to be adjusted depending on the size of the cut blade you are using.

Can I punch and round more than one paper? like a whole book? thanks!

We use it for vehicle magnets and business cards. You could probably round around 100-150 sheets of paper. I doubt you could do a whole book, but again depends on book.

which are the cutting dies provided? In inches please, thanks

1/2 1/4 3/8 5/8 Not a bad machine but is hard to get setup for a good cut.

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✂️ Cut Corners, Not Quality — Elevate Your Brand’s Edge!

ROCK SOLID STABILITY - Heavy metal base ensures zero slip for ultra-precise corner rounding.
PRECISION MEETS POWER - Hardened steel dies deliver flawless, professional corner cuts every time.
VERSATILE MEDIA MASTER - Perfect for business cards, photos, plastic cards, magnet sheets, and even thin aluminum.
STACK SLASH EFFICIENCY - Cut through up to 40 business cards or 1.2" thick stacks in a single, smooth press.
MANUAL CONTROL MAXIMUM IMPACT - Ergonomic manual operation gives you full control with no power needed.

The Corner Rounder Cutter DC-03 by Dingword is a heavy-duty, all-metal manual corner rounding machine featuring 3 hardened steel dies. It effortlessly cuts up to 1.2 inches thick stacks—equivalent to 40 business cards—while its sturdy metal base guarantees stability and precision. Ideal for a wide range of materials including paper, plastic, magnet sheets, and thin aluminum, this tool is a must-have for professionals seeking flawless, polished edges.

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Material	Metal
Color	Black
Active Surface Area	96 square inches
Operation Mode	Manual
Print media	Paper (plain)
Manufacturer	Dingword
Is Discontinued By Manufacturer	No
Material Type	Metal
Manufacturer Part Number	DC-03

Corner Rounder Cutter with 3 Dies , Round Cornering Machine for Stack Paper. Heavy Duty.

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