Professional tool for commercial or occasional use 3/8" Drive extension bar set 3/8" drive so will fit any 3/8" drive ratchets / power bars Manufactured from chrome vanadium steel for strength and durability Heat treated highly mirror polished finish with knurled rings for added grip when using in oily slippy conditions 5 pc 3/8 drive extension bar set SET INCLUDES THE FOLLOWING SIZES - 1 x 3/8" Drive Extension Bar - total length 38mm - 1 x 3/8" Drive Extension Bar - total length 75mm - 1 x 3/8" Drive Extension Bar - total length 150mm - 1 x 3/8" Drive Extension Bar - total length 250mm - 1 x 3/8" Drive Extension Bar - total length 400mm Comes in a plastic blow molded box for easy storage and transportation