Max EH-50F Max EH-50F Heavy-Duty Flat Clinch Electric Stapler, 50 Sheet Cap. EH-50F heavy-duty 50-sheet capacity electronic stapler provides flat clinch stapling with a quiet, motor-driven mechanism. Ultra-quiet, ultra-efficient motor-driven mechanism staples up to 5,000 times without reloading. Flat-clinch staple closes flat so papers stack neatly and evenly. Staple clearing latch. Throat adjusts from 1/4 inch to 3/4 inch.