3 Hole Puncher 7mm Diameter Adjustable Spacing Metal Hole Punch Manual Pocket A4 Paper Punching Tool. Features: 3 holes design, adjustable spacing, metal structure, non-slip pad base, and paper scrap box. Specifications: Item Type: 3 Hole Punch, Number of Hole: 3 Holes, Adjustable Hole Spacing, Hole Diameter: Approx. 7mm, Feeding Depth: Approx. 12mm, Material: Metal. How to use: Press the top cover, remove the top cover fastener, adjust the spacing distance, insert the paper, and press the handle to complete the punching action.