640-4 Backer Rod Tool. Set foam backer rod in caulk joints quickly, at a consistent depth and without puncturing.
Adjustable for placing backer rod at any designed depth up to 1″ deep.
Similar to standard model but with a reinforced resin handle to withstand rough use on horizontal surfaces.
Accepts a threaded standard broom handle (extension pole).
Includes four depth setting wheels for 1/8″, 1/4″, 3/8″ and 1/2″ wide joints.