Expert Quality, With Wobble End, Manufactured From Chrome Vanadium Steel Hardened And Tempered With A Micro Satin Finish. Each Ext. Bar Has A Knurled Ring For Extra Grip. Machined Wobble End Allows Sockets To Be Driven At Up To 15° To The Vertical. Attached With A Spring - Loaded Ball Bearing For Secure Socket Holding. Display Packed.