Stainless Steel Checkbook Security Wallet Capacity: 12 credit card slots, Checkbook slot and cash. Ultra-thin & Ultra durable. Resistant to corrosive materials such as salts, acids, seawater and more. Blocks RFID scanning of your credit cards, to help prevent identity theft! Virtually indestructible wallet feels like silk. Very secure and safe, holds a ton and fits easily into any handbag.