Midwest Rake 1/2" Super Sharp Polyethylene Spike Rollers and Frames Polyethylene Spike Rollers are vital in ensuring proper floor coating material adhesion. They are designed to be used on freshly applied floor coatings to release gas and assist in the leveling process for various floor coatings. Features Available in 9" and 18" widths Manufactured with solvent resistant High-Density (HD) and Ultra-High Molecular Weight (UHMW) Polyethylene for easier cleanup and extended wear 12" Super Sharp Spike Lengths. 33 Spikes around the diameter of the roll 9" & 18" wide roller and heavy-duty aluminum frame are now sold separately The aluminum frame is made with high-grade stainless steel axles, superior gusset bracing, and a maximum-strength threaded handle adapter Should be used with Shoe-In Spiked Shoes for Resinous Coating