Install backer rod faster and easier with the Albion Walk-Behind
Backer Rod Tool. This professional insertion machine saves labor and
time on large concrete joints & paving. Set foam backer rod in caulk joints quickly, at a consistent depth and without puncturing. Adjustable depth.Standard model includes 4 insertion wheels of different widths (1/8in., 1/4in., 3/8in. and 1/2in. wide) and 1 tamping blade.