Electronic punch system is recommended for medium to large offices with weekly usage. GuideRight paper alignment aligns paper for accurate punching every time. Front & side guides ensure paper is aligned before punching. Punch documents with the simple push of a button. Bind ProClick spines fast to meet tight deadlines. Easily add or delete pages without a machine. Punch system offers a punch capacity of 15 letter-size sheets (20 lb. bond) & oversize covers & a bind capacity of 110 sheets. Maximum comb size is 5/8".