Tractors MX-5400, Brush Hog (aka Rotary Cutter) Is a Land Pride 6 Footer. I broke my first shear pin after having the brush hog a year and a half (but with only about 35 hours on the brush hog) Pretty good run and it's kind of expected to break one every now and then. I looked in my garage and couldn't find any 1/2" x 3" Grade 2 bolts so went to the hardware store, no luck there, only grade 5 and grade 8, so then went to dealer and they were out. So then went to Tractor supply and bought a 5 pack of country line shear bolts and broke 3 while mowing a half hour lol.