The MR35 Series Retractable Box Scraper features a manual shank tube and is available in high back (MR35) or low back (MRL35) design. Work done with the retractable box blades is done forwards and backwards. Knurled bushings at the upper and lower hitch points eliminate premature wear. 3-Position heat treated spring steel shanks allow for deep to shallow settings. The hinged rear backfill blade can be in float or fixed position for either a packed-down or rough grade job.