These 75mm light duty pressed steel swivel castors with 10mm bolt hole fitting and a 75mm black plastic wheel, overall height 101mm, load capacity 75kgs per castor, is suitable for a wide variety of light duty applications. These bolt hole castors can be teamed up with tubular expanders for easy attachment into hollow tubular legs, and also with a Spring Fitting adaptor, enabling the castors to become a Spring Loaded Castor, ideal for mobile step ladders and spring loaded stools. 75mm Bolt Hole Castors Black Plastic Wheel