Bolt Hole castors with a Pressed steel castor bracket, fitted with a grey non marking rubber tyre on plastic centre wheel . These Bolt Hole casters range from 80mm-200mm and have a capacity up to 205 Kg per caster. Grey rubber tyred castor wheels give a smooth ride and are quiet. Although load capacities of these castors are not very high they are used on warehouse trolleys, Sack truck wheels and jockey wheels. If they are not used over a period of time these castors can develop flats. grey rubber tyres protect the floor from damage.