In this photoe i have grass befor plugging and during , The one on the right is a full plugg the one in the middle, is a hinge plug and the one on the left is a slit that i pry open and then dig down thru the center placing the dirt in a bowland pluck grass to put in when filling , the one on the left is the one i use in really nice grass it is also very much easear to dig i tell you if I had to dig 32 full plugs i would be so worn out , now in a few days i will post how the grass is doing , which one will turn brown , which one will not . see you in a few days Gunnar