Replacement punch kit of three replacement punch heads and three discs. Replace punch heads and discs every 12 months to ensure the best hole-punch performance. Punch heads are compatible with the Swingline® Extra High-Capacity 3-Hole Punch only. Punches three 9/32" diameter holes through up to 300 sheets. Accessory Type: Replacement Punch Head; Hole Diameter: 9/32"; For Use With: Swingline® 74194.