SD-1501A21 Office Machine Binding Machine Manual Combs/Clamps Binder For Binding A4 Paper Stapled 21 Holes Hole Size 3*8 Mm ,Easy to Operate

Machine all steel inside and outside the structure, technology, , nice, easy to damage. Solid round steel handle, efficient and effort, punching pressure ring one machine operation, convenient and time-saving. Use the positioner to fix the paper position, sothat the hole out of symmetry, binding beautiful. 21 high-grade all-steel carbon steel knife, strong punching, plastic folder clip dual-use, binding simple. Machine back margin adjustment button, twist knob can adjust the margin size, margin can be 3-6MM adjustment.