The BW-3 Adjustable Joist Gripper Attachment worked as advertised. It attached to 4x6 joists easily and eliminated bows in the decking lumber.

I ordered the product for someone else, but the report is that the tool is extremely helpful and was a great buy.

"Bo" is a "can't do without tool!" My crew and I have used it for both standard decking and 2x decking with great success. We also use it in conjunction with heavy duty cargo straps to pull the decking tight for long runs. We mount decking from the bottom with one guy on top to keep the big "Bo" running at full speed. The product can be set-up several ways and is a tool no serious deck builder should be without. My crew is both male and female and everyone can use the "Bo" with ease. We have used it equally well with the optional bar on 4x timbers. Laminate the directions so you do not forget the many optional set-ups.

If you are building a deck with real wood and have double joices this is a must companion to the bowrench.