insulation trimmer

This is a die grinder with a couple of stops hose clamped on to mill the original insulation to a depth of 3/4. That way more 3/4 insulation would fit completely filling the space in the ceiling and walls. The 2X4 is held across a couple of ribs and the stops hold the grinder so it cuts the original insulation to a depth of 3/4. Was a messy job, wear a mask.