Features: 45# carbon steel body traction material, steel chrome vanadium ratchet CRV Surface Treatment: Polished Chrome Hardness of heat treatment Pull the body: 38-45 degrees ratchet: 42-48 degrees Good wear and rust resistance Flexible ratchet head: rotating head specification: 1. Material: Steel CR-V 2. Size: 6/8/9/10/11/12/13/14/15/16/17/18/19/21/22/24mm 3. Suitable for use in narrow places