Our best Driver is (Driver 5) & I am partial to the Front-Clamp style. All one does is pull a Tee post out of the your Tractor Bucket and throw that T-post up in our driver barrel past the spring, Move into position and press down, reach once again into the bucket to pull out another new T-post and repeat time and time again. The faster and harder you work this driver the better it operates. Good for new and used T-posts if the top ends of your posts are not mushroomed over. If you reuse a lot of T-posts and the tops are beaten over then (Driver 4) is the best for your operation. Driver 4 barrel is open and can handle these used posts. All drivers are designed to hang straight up and down under a load by welding our knuckles off center onto our swivel's. Now our Barrels are positioned farther from your Bucket & allows you to approach the fence-row from any direction to press-down your T-posts. Throw a chain over your bucket near that New Driver to use as a marker for setting in T-posts. When that chain touches the ground your T-post is in at the right depth. No more measuring each T-post. Now for very very extremely (Harden Ground) and small rocks beds a gas high pressure water sprayer would aid in opening up and soften each hole to allow you to press in your tee posts. Hardly ever needed. (Side-Mounts & Front-Clamps) hold our Drivers. Our Driver Front-Clamps are directly sold to fit your tractor bucket and that is determined by the thickness of your bucket's cutting edge and inward 5 inches deep. (Side-Mount) do move our drivers to the side 5" more than the Front-Clamp. However the knuckle postioning of the Front-Clamp may allows for a slightly quicker Driver recovery time. Less knuckle side-wobble is needed and depending on the depth say 2ft. that you press-down one would tilt & back-up slightly to correct for bucket fading. Fitting the Side-Mount on your bucket place the Mount & Driver together, stand them up on one of your T-posts. Lean everything up against your bucket at the most convenient highest outer edge or fartherst from front tire. Tilt bucket ram out 3" to 5"(The smaller the Tractor the more tilt is needed) have knuckle in driver and clamp  tilted down and away from tractor as you press down your posts you will tilt back clamp and knuckle will become level and center up. Mark the holes off the Mount onto your bucket and drill or cut out. After driving in 6 posts with either type clamp the job becomes automatic and safer. Any Questions please call 1-580-747-9288 and ask for Mike. We have a 30 day refund or exchange on all drivers and clamps. We chose U.S. Postal to deliver our freight. The 2-3 day delivery has the best price for your money and along with our whole-sale pricing is a great savings for what this product can do for you. Our main purpose is to offer Farmers and Ranchers a better than good, safe T-post Driver. We do own the exclusive rights by U.S. Law. Bucke-T-Driver is a subsidiary of Bucke-Tee, LLC certifies compliance with O.S.H.A. law. Read safety information and disclaimer on website before operating our equipment.