- Durable construction: The upper and lower blades are hardened steel, mounted on a die-cast alloy base for sturdiness and impact resistance. Built to last with quality guaranteed. - Precise, flexible punching: Rectangular holes measure 3 x 8 mm and can be set from 1 up to 21 holes, using the 21-hole full-pulling knife. Both upper and lower blades are stainless steel for long life. - Efficient waste management: Large capacity drawer-style waste box keeps paper scraps contained and reduces frequent emptying. - Manual, easy operation: Hand crank design requires no power plug; smooth, low-effort punching. The device supports left-handed, right-handed, or two-handed operation with a full-grip hand punch. - Quick binding support: Optional electric coil insert makes binding coil projects fast and straightforward. - Practical applications: Ideal for office reports, proposals, and manuals; bind training handouts, worksheets, and course packs; assemble client proposals, product catalogs, or price lists with clean, uniform holes.