Comparison : Item # HR-1/2, HR, HR-X Heavy Stud Screwdriver Slot
Item # HR-5/8, HR, HR-X Heavy Stud Screwdriver Slot
Item # HR-3/4, HR, HR-X Heavy Stud Screwdriver Slot
Item # HR-7/8, HR, HR-X Heavy Stud Screwdriver Slot
Item # HR-1, HR, HR-X Heavy Stud Screwdriver Slot