T63 Quick Change Tool Set. Tool Post For – Harrison, Bantams and Colchester – Any Lathe 5-1/2″ and 6″ Lathes. This Quick Change set includes; 10 standard holders, main block, spanner. Main block dimensions – 72mm Square – 63mm High with a 5/8 Bore. Tool Capacity – 25mm. PROUDLY MADE IN INDIA. Ravish international Tools comprises of a dedicated and skilled team of engineers with an aim of providing you tools of highest indian industrial standards. Situated at the industrial hub of India we specialize in providing complete tooling solutions. Our Motto : Right Quality. The Motto of the Company is to deliver the best products and services to the customers at most competitive prices.