IHTH-3 & IHTH-1 are Stainless Steel IHTH-2 & IHTH-4 are Zinc Plated Steel
IHTH-3 for 3/32"
IHTH-1 for 1/8" - 5/32"
IHTH-2 for 1/8" - 5/32"
IHTH-4 for 5/16"
