Heat treated alloy steel Extra long for easy handling Lightweight barrel A high quality extra large key designed to make double locking and unlocking restraints faster and easier. The extra long aluminum barrel is oversized and knurled for lighter weight and easy handling. The flag tip and double lock pin are made from heat treated alloy steel for high strength and durability. Compatible with all standard type handcuff locking mechanism.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }