Features(stone):_x000D_ 1. 1/4" shank fits any power drill; built-in guide can produce proper edge-angle_x000D_ 2. It is a easy lawnmower blade, suitable for all electric drill which can provide faster cutting_x000D_ 3. The stone can help you brings back primal blade-edge sharpness and eliminate blade nicks from rocks and sticks_x000D_ 4. This stone can work on most grass cutter without blade removal_x000D_ _x000D_ _x000D_ Specification:_x000D_ Size: Approx. 50mm / 2.0in_x000D_ Color: As the picture shown_x000D_ Materials: Corundum_x000D_ _x000D_ _x000D_ Package Listing:_x000D_ 1 * Lawnmower Blade Sharpener _x000D_ _x000D_ Features(balancer): _x000D_ 1. This product can quickly test mower cutter balance _x000D_ 2. It is easy to see which end of the cutter is light and which end is heavy with the balancer. _x000D_ 3. The cutter balancer has a simple structure and good practicability _x000D_ 4. Suitable for outdoor, family and garden grass maintenance using. _x000D_ _x000D_ Specification: _x000D_ Material: ABS _x000D_ Size: Approx. 60 * 50mm / 2.4 * 2.0in _x000D_ _x000D_ Packing List: _x000D_ 1* Lawn Mower Blade Balancer