Plastic Joint Knife Set - 6, 8, 10" by Marshalltown Tools Sold out $3.50 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Sold out This flexible plastic joint knife set includes 6 in., 8 in., and 10 in. wide blades used to spread joint compound, spackle or adhesive. Tapered blade bends and is reinforced to resist breaking These plastic joint knives are comfortable and have a contoured handle Made of high-impact polystyrene Item ID 28230