12" Digging Chain w/ Shark Style Carbide Teeth Pilot Bits This 18-Inch digging chain fits

This 18-Inch digging chain fits all 18-inch Ground Hog T-4 Trenchers

Part Number: H420

Pivot Plate for HD99 Auger

The 100 Fishtail is the screw-in pilot bit used on Ground Hog Standard

Part Number: SD10

12" Digging Chain w/ Shark Style Carbide Teeth Pilot Bits This 18-Inch digging chain fitsPart Number: 60132S Complete 12 inch Digging Chain with Shark Style Carbide Teeth for the Ground Hog Inc. T 4 Trencher. The Shark Style Carbide Teeth are ideal for general purpose soil conditions. The Shark chain excels in all soil conditions except when baseball size and larger rocks are present. Chain comes assembled. Includes Master Link, Double Shark Tooth, and Hardware.