Guerin Rife IMO Trainer Putter This makes swinging on plane automatic. No pulls. No pushes. Just dead straight.nbsp A new weighting innovation This makes swinging on plane automatic. pulls. No pushes. Just dead straight. Identical to the center portion of the IMO it has 100% of the head mass in a center elongated shape. It is considered non conforming by the USGA because it has a heel to toe measurement that is less 2 in than the face to rear measurement 4.60 . It's purpose is to allow a golfer to feel how easy it is to swing on plane when all the weight is on plane as well. As a training device it allows a golfer to focus on swinging naturally along the target line thru the ball to the hole. This virtually eliminates deceleration. The Trainer is also an excellent sales tool at the retail level. It immediately explains the concept. A sales person might say, The USGA has deemed this illegal because it is too easy to use. The IMO is the same putter but it's legal. As you can see they have hollowed out the side wings so 85% of the weight is still lined up behind the ball. Features Material injection mold aluminum. Face Plate 6061 milled aluminum with RollGrooves Head Weight 360 grams Swing Weight 35 F3 Feel Wt. C9 Shafting face balanced mid heel double bend Lie Angle 70 degrees Offset one half shaft Grip Rife custom Shaft True Temper w flutes MOI 4,900