Comparison : Item # HR-1/2-B, HR-B, HR-XB Heavy Stud Hex Slot
Item # HR-5/8-B, HR-B, HR-XB Heavy Stud Hex Slot
Item # HR-3/4-B, HR-B, HR-XB Heavy Stud Hex Slot
Item # HR-7/8-B, HR-B, HR-XB Heavy Stud Hex Slot
Item # HR-1-B, HR-B, HR-XB Heavy Stud Hex Slot