This double castor with a diameter of Ø50mm, has a single bolt hole. It is a durable castor and designed for small furniture, commercial equipment, display stands, music devices, etc. These castors offer the elasticity of rubber castors combined with the strength and durability of metal castors. It allows a 360-degree rotation for easy rotation at any angle. It brings security to all types of ground and it is a very noiseless castor when driving on rough terrain.