Invisible sod replacement.Finish patch areas without leaving holes or gaps.Four razor-sharp blades secure 23 (cm.) square cut wedge-shaped sod blocks that fit and butt perfectly.Standard Golf - TURF DOCTOR™-ASSEMBLY MANUALhttps://drive.google.com/file/d/1AihQ7LTRqB1f8sIxqBXALylfYc2QavAe/view?usp=sharing