Comparison : Item # HR-1/2-BC, HR-BC, HR-XBC Heavy Stud Crowned Hex Slot
Item # HR-5/8-BC, HR-BC, HR-XBC Heavy Stud Crowned Hex Slot
Item # HR-3/4-BC, HR-BC, HR-XBC Heavy Stud Crowned Hex Slot
Item # HR-7/8-BC, HR-BC, HR-XBC Heavy Stud Crowned Hex Slot
Item # HR-1-BC, HR-BC, HR-XBC Heavy Stud Crowned Hex Slot