Heavy-Duty Electric Punch and Manual Comb Binder. The Akiles CombMac-24E makes comb binding fast and easy. This efficient 14" machine produces a professionally finished product. Its reliable and practical design makes it the perfect fit for any office. (Item# CM24) Pitch - 9/16”, Punch - Electric, Punching Length - 14” (24 dies), Hole Punch - Rectangular (5/16” x 1/8”), Comb Binding Capacity - 3/16” – 2” Punching Capacity - Up to 25 sheets of 20 lb. paper