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KW-triO 9Z1CW Four-Way Corner Rounder for Paper
- Three Convex Radii. Choose R4, R7 or R10 for an outside corner. Inward Round Cut. Use the fourth cutting position for an inward curve. Compact Body. The white body measures 78 x 67 x 46 mm. Transparent Offcut Cover. The underside cover catches paper scraps.
Exquisite Details & Design Features
Carefully-crafted details showcase superior craftsmanship and outstanding design features.

Corner Rounder Features
Choose R4, R7 or R10 for an outside corner.
Uncover Our Core Product Advantages
Reliable quality and solid performance for your varied usage scenarios. Rigorous production standards ensure great durability and cost‑efficiency.

Seat one corner flat in the appropriate guide.

Press the white paddle down with the paper seated.

Inspect the resulting curve before trimming another corner.

Swing open the clear cover to empty the offcuts.
Compatible devices
File Finished Sheets
Sort trimmed documents in an accordion file after rounding the corners.

Product parameters
Flexible for multiple scenarios
Finish paper corners with the KW-triO 9Z1CW. The compact white punch offers R4, R7 and R10 convex cuts plus an inward round cut. Slide the paper into the matching guide and press the paddle. The clear bottom cover collects offcuts.

Seat the card corner flat in the selected guide before pressing the white lever.


Empty the clear bottom cover when cuttings accumulate beneath the cutting plate.

Packaging list
1 x KW-triO 9Z1CW corner rounder, White.
Frequently Asked Questions
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