Backer Rod Insertion Tool – STANDARD MODEL 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 (1/8″, 1/4″, 3/8″ and 1/2″ wide) and 1 tamping bladeReplacement wheels available: 640-G02 = 1/8″ 640-G03 = 1/4″ 640-G04 = 3/8″ 640-G05 = 1/2″ 640-G18 = Tamp Blade 640-H15 = Thumb Screw 640-G11 = Main frame assembly with washers, pushnuts and 640-H21 1/2″ wheels.
