For those greens that already have thatch at depth the ATT Scarifier Cassette is the obvious choice. The 5 bladed super tough 1.6mm blades spaced at 40mm apart and capable of working to a depth of 14mm are more than up to the task. The brush spacers ensure thorough clean-up and effective throwing of the removed thatch into the grass catchers. Consecutive use in multiple directions will still result in minimal surface disruption. A great tool to use prior to overseeding.