The collar diameter of the GroundGrabba Pro GR13 series is 1"

Combining strength and durability

Dramatically increase planting productivity and efficiency with Power Planter augers

Take care to choose the appropriate length of cable

HookWasher Packs | Suits Commercial GR14 | 3.5mm Mild Steel | Hot Dip Galvanized Quantity:4 Pack The collar diameter of theMade for our GroundGrabba Commercial range, the GR14 Washers have a large 70mm diameter. These cover the large diameter hold that the flights (spirals) of the GroundGrabba Commercials need to get through to screw into the ground. Hot dipped galvanized for years of commercial use. The GroundGrabba Hook Washer is designed to help you anchor down your outdoor equipment where the hole diameter needed to pass your GroundGrabba though is larger than the