Comparison : Item # 1/4, 4140 Aircraft Annealed & Cold Finished Alloy - Rounds
Item # 5/16, 4140 Aircraft Annealed & Cold Finished Alloy - Rounds
Item # 3/8, 4140 Aircraft Annealed & Cold Finished Alloy - Rounds
Item # 7/16, 4140 Aircraft Annealed & Cold Finished Alloy - Rounds
Item # 1/2, 4140 Aircraft Annealed & Cold Finished Alloy - Rounds