Aluminum body, automatic return of blade when releasing button, no tool required to manipulate the knife, Interlock system in the front side. Stony Smart Locking Technology One Hand Operation Knurl Jaw Adjusment Jaws With Scale Marking Anti - Rust Paint Protection “I” Handle Constriction For Extra Load Heavy Duty Drop Forged Fixed Teeth Extra Holding Strenght Heavy Duty, Unbrakable Drop Forged Jaws Light Hammering For Limited Use Size / 12"