Gang Knife Upper Guide Block 5 mm, Gang Knife Upper Guide Block 1/4″, Gang Knife Upper Guide Block 8 mm (.315″ c-c), Gang Knife Upper Guide Block 3/8″, Gang Knife Upper Guide Block 1/2″, Gang Knife Upper Guide Block 5/8″, Gang Knife Upper Guide Block 3/4″, Gang Knife Upper Guide Block 1″, Gang Knife Upper Guide Block 1-1/2″, Gang Knife Upper Guide Block, no slots (Used on cube sizes larger than 1/2”)