Standard staple refills for the Powerhouse Electric Stapler Staples up to 45 sheets using our Powerhouse Electric Stapler Newly redesigned; stronger and sharper chisel points for maximum stapling ability Better tensile strength; won’t bend or warp under pressure like the other guys Limited Lifetime Guarantee; our products are of great quality and we stand behind them; if your Powerhouse refill staples fail you in any way, return them for a full refund