Custom built by a welder. Very heavy duty. Levels and scrapes top 2-3" of soil to create a seedbed for grass seed. Attaches to a standard 3-point hitch. 5 feet wide. Cost $2,000 when new. See this ad for comparison: https://www.goodworkstractors.com/product/dirt-dog-pulverizer/?attribute_pa_width=66&attribute_pa_ripper-style=bar-shank&attribute_pa_rollers=double&gad_source=5&gad_campaignid=22027430143&gclid=EAIaIQobChMIu--Lsa-jjgMVl0xHAR1Yfhr_EAEYASADEgLDtPD_BwE