Description: Material: Made of iron material, this caster floor lock is sturdy and wear resistant, ensures durability and longevity even under heavy use Product Dimensions: This medium casters floor brake base plate measures 9.8cmx9cm, allows for easy adjustment to suit your specific needs Feature: With its built-in spring design and brake system, this caster wheel floor lack provides great mobility while ensuring stability when needed Stable: Use with casters to achieve full control of your trolley or cart. The stable structure makes the floor lock sturdy and reliable in use Versatile: This floor lock is designed for a wide range of applications, including various hand trucks, electric stackers, automated equipment, and various industrial equipment Specification: Material: Iron Size Chart: Type A Base: 9.8cmx9cm/3.86inchx3.54inch Retracted Height: 9.1cm/3.58inch, Extended Height: 10.9cm/4.29inch Type B Base: 9.8cmx9cm/3.86inchx3.54inch Retracted Height: 11.6cm/4.57inch, Extended Height: 13.4cm/5.28inch Type C Base: 9.8cmx9cm/3.86inchx3.54inch Retracted Height: 14.1cm/5.55inch, Extended Height: 15.9cm/6.26inch Package Includes: 1 Set Medium Casters Floor Lock Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.