The “G” series blade technology delivers superior grooving power in an easy to use product. These blades are compatible with the GV1000 Van Alstine Tire Groover and are a made from a heavier gauge metal than the “V” Series blades. Blades are available in Flat Bottom or Round Bottom – 7 different sizes in the flat bottom and 8 different sizes in the round bottom. Each set includes 12 blades. Blades are measured in 32nds of an inch i.e. blade #1 will make a groove 1/32″ wide & blade #10 will make a groove 10/32″ wide etc. Please see the blade size chart in the gallery images.