Abstract: A sports shoe with a sole comprising a novel cleat. A sports shoe may comprise a first cleat at the ball area of the sole and a second cleat at the heel area of the sole. The cleats have a circular wall that extends outward from the sole, the circular wall having a substantially straight outer surface, a graded inner surface, and a rim. The cleats are constructed of a substantially rigid material and have a front section higher than a rear section. The graded inner surface of the wall is curved. The graded inner surface of the wall has a radius of curvature that remains the same from the rim to the base and from the front section to the rear section of the cleat. In alternate embodiments the radius of curvature may vary from the rim towards the base of the cleat where the cleat connects to the sole, and from the front section of the cleat to the rear section of the cleat.

Abstract: A grass cutting machine using flail-type centrifugally stiffened blades (32) pivotally mounted on a cutter hub (30) on a motor shaft (28). The cutter and a motor assembly (20, 22) are mounted on wheels (42). Preferably the cutter rotation axis is parallel to the direction of travel. This efficiently sculpts a concave channel (62) in grass as the machine is rolled across a lawn (60). A laterally extending guide tube (46) may be attached to the machine to visually guide a user in cutting a channel parallel to a previously cut channel.