Make your backhoe more versatile with a mechanical thumb. Pinch logs, move rocks, save your back! Wallenstein's thumb bolts to your BX24's boom in a matter of minutes. The construction of the product is second to none. Adjustable position bracket (in black) has three positions for operation and a fourth that swings the thumb up and out of the way. A much more versatile and sturdy design than the backyard contraptions of the past. This new Generation 4 design clamps the boom tighter than other thumbs preventing slipage.