A hand-held device includes a first member and a second member coupled together by a pivot point such that each member may rotate independently. The hand-held device further comprises a handle on one side of each member and a protrusion on an opposite side of each member. Further, the hand-held device may include counter-torque extensions which extend from each member such that the counter-torque extensions touch when the device is engaged.

A hand-held device includes a first member and a second member coupled together by a pivot point such that each member may rotate independently. The hand-held device further comprises a handle on one side of each member and a protrusion on an opposite side of each member. Further, the hand-held device may include counter-torque extensions which extend from each member such that the counter-torque extensions touch when the device is engaged.

A hand tool includes a first jaw; a second jaw rotatably coupled to the first jaw, the second jaw including a first set of projections and a first bearing surface, the first bearing surface having a first curvature; and a lever coupled to the first jaw, the lever including a second set of projections and a second bearing surface, the second bearing surface having a second curvature. During a movement of the first and second jaws from a full open position to a full close position, the first and second sets of projections are at least partially engaged to prevent a slippage between the first and second bearing surfaces that are in a rolling contact during the movement of the first and second jaws from the full open position to the full close position.

Shears having two limbs connected at a revolute joint, each limb comprising a handle region at one end and a cutting edge at the other end. One limb is fixed relative to the revolute joint during an opening and closing movement, and one limb is movable. The limbs move between an open position and a closed position while being limited by a stop and, in the closed position, the cutting edges pass each other over substantially their entire length. On the handle side of the revolute joint, one limb extends relative to the other limb such that it is supported in a planar manner on both sides in a region of overlap with the other limb, wherein the limbs comprise surface regions which, in the closed position, rest against one another in the region in which they are on top of each other and are each exposed on the opposite side.

Shears having two limbs connected at a revolute joint, each limb comprising a handle region at one end and a cutting edge at the other end. One limb is fixed relative to the revolute joint during an opening and closing movement, and one limb is movable. The limbs move between an open position and a closed position while being limited by a stop and, in the closed position, the cutting edges pass each other over substantially their entire length. On the handle side of the revolute joint, one limb extends relative to the other limb such that it is supported in a planar manner on both sides in a region of overlap with the other limb, wherein the limbs comprise surface regions which, in the closed position, rest against one another in the region in which they are on top of each other and are each exposed on the opposite side.

Shears configured with blade pieces having pin holes, at least one of which is polygonal, along basal ends of the blade pieces, and a pin-hole swivel pin, and provided with grooves on either of opposing inner-side faces of the blade pieces. When the shears are in a predetermined open/close state, the grooves lead from the pin holes to the blade pieces' exterior. The pin is constituted by a columnar pin shank ending in cap portions. Rotatable, the pin shank interiorly contacts the polygonal pin hole's sides. The cap portion along the at least one blade piece having the polygonal pin hole has an opening interconnecting a gap between the pin hole and the pin shank with the cap portion's outer side. The grooves, the pin-hole/pin-shank gap, and the opening secure washing-fluid or air channels for cleaning out the pin holes, and realize a light, jiggle-free operational feel.

Shears configured with blade pieces having pin holes, at least one of which is polygonal, along basal ends of the blade pieces, and a pin-hole swivel pin, and provided with grooves on either of opposing inner-side faces of the blade pieces. When the shears are in a predetermined open/close state, the grooves lead from the pin holes to the blade pieces' exterior. The pin is constituted by a columnar pin shank ending in cap portions. Rotatable, the pin shank interiorly contacts the polygonal pin hole's sides. The cap portion along the at least one blade piece having the polygonal pin hole has an opening interconnecting a gap between the pin hole and the pin shank with the cap portion's outer side. The grooves, the pin-hole/pin-shank gap, and the opening secure washing-fluid or air channels for cleaning out the pin holes, and realize a light, jiggle-free operational feel.

A composite coating is provided for a tool. The tool can be a pair of scissors or a screwdriver for example. The tool is made with at least one contact face. The composite coating includes diamond grains and layer of metal oxide. The metal oxide is used as an adhesive to secure the diamond grains to the contact face.

A composite coating is provided for a tool. The tool can be a pair of scissors or a screwdriver for example. The tool is made with at least one contact face. The composite coating includes diamond grains and layer of metal oxide. The metal oxide is used as an adhesive to secure the diamond grains to the contact face.