Ideal for large paper stacks the optima 40 electric stapler puts you in control of where and when the staple goes used with optima staples it offers jam free space efficient flat clinch stapling while the led indicator alerts you to refill with a 32mm throat depth it staples up to 40 sheets at once includes 1000 optima 56 staples plus a mains adaptor features jam free stapling with optima premium staples patented flat clinch mechanism for neater stacks of paper led low staple indicator