The Winchester Supreme Elite PDX1 Person Defense line of shotgun ammunition represents the combination of two excellent personal defense technologies - Winchester's unique Grex buffered copper-plated shot and the black oxide high-base head of the PDX1 design.Simply put these personal defense loads are equipped to deliver ultimate threat-stopping power at both short and long range. Best of all these shells are backed by the 140 years of experience of all Winchester products not to mention the company's commitment to quality. Specifications for Winchester Defender Shotshell 410 Bore 1/3 oz 3" Shotgun Ammunition: Manufacturer: Winchester Gauge: .410 Number of Rounds: 10 Shot Size: BB Shell Length: 3 in Muzzle Velocity: 750 ft/s Application: Personal Defense Included Accessories: None Shotgun Shot Weight: 1/4 oz Shot Material: Lead Primer Style: Centerfire Cartridge Case Material: Brass Lead Free: No Features of Winchester DEFENDER SHOTSHELL 410 Bore 1/3 oz 3" Centerfire Shotgun Ammunition: 4 Plated Defense Disc ProjectilesOptimal penetration and knock-down 16 Plated BBsMassive shock and compensates for aim error Ideal for Short-Range Personal Defense Package Contents: Winchester DEFENDER SHOTSHELL 410 Bore 1/3 oz 3" Centerfire Shotgun Ammunition What is Winchester Defender Shotshell 410 Bore 1/3 oz 3" Shotgun Ammunition good for? The manufacturer suggests that it is suitable for personal defense.