When it comes to heavy duty 4-hole punching the ALU 40 is the perfect punch for the job. With a 40 sheet capacity, the ALU 40 features an extended handle for maximum leverage and easy operation along with a full, one-piece aluminium alloy casting top cap for a high quality finish. Offering standard setting 4-hole. When it comes to heavy duty 4-hole punching the ALU 40 is the perfect punch for the job. With a 40 sheet capacity, the ALU 40 features an extended handle for maximum leverage and easy operation along with a full, one-piece aluminium alloy casting top cap for a high quality finish. Offering standard setting 4-hole punching, this punch also features a handle lock-down switch for easy storage, flip-open confetti tray, an adjustable paper guide, personalisation window and comes backed by our 15 year guarantee.