Record Power 50mm Standard Jaws for SC3 & SC4 Chucks 62313Buy 2 or more Record Power Chuck Jaws and get 10% Discount Featuring a specialised dovetail profile in expansion and the superb grip of the hawk beak design on contraction, these versatile jaws are a great all round set, capable of bowl work to a good size and also spigot turning. They are supplied as standard with the SC3 and SC4 chucks. Expansion: 52 72 mm Contraction Spigot: 42 61 mm Contraction Square: 30 51 mm Part No. 62313 62313 50mm Standard