We have the LOWEST prices and BEST thumb on the market. Our competitors thumbs are only 3/8 material. Our thumbs have 1/2 teeth. Semi-Hydraulic Backhoe thumb that goes 90°to 175° forward, to fold the thumb back on your boom you will need to pull the pin out, and take the cylinder out. 32 Slim Semi Hydraulic Backhoe Thumb. Weld on Base: 4 ¾" x 18". Hydraulic Cylinder 2" Bore 6" Stroke (Up to 2500 PSI). Please measure your bucket like the one picture shows. If you put a 25" thumb on a hoe that needs a 31" you will probably bend or break something. Larger hoe's have more bucket ...