Jam Free Guaranteed for non-stop use. Staples 25% more sheets than comparable models.25-sheet stapling capacity. Metal construction ensures maximum durability. Smoothly contoured for the best handheld precision stapling? can stand-up on end for easier handheld grab to use. Recommended for use with Optima™ or S.F.® 4® Premium Staples. Holds a full strip.100% Performance Guarantee when used with recommended staples.