Features 1、This stone can work on most grass cutter without blade removal 2、It is a easy lawnmower blade, suitable for all electric drill which can provide faster cutting 3、The stone can help you brings back primal blade-edge sharpness and eliminate blade nicks from rocks and sticks 4、This product can quickly test mower cutter balance 5、It is easy to see which end of the cutter is light and which end is heavy with the balancer. Specification Features(stone): 1. 1/4" shank fits any power drill; built-in guide can produce proper edge-angle 2. It is a easy lawnmower blade, suitable for all electric drill which can provide faster cutting 3. The stone can help you brings back primal blade-edge sharpness and eliminate blade nicks from rocks and sticks 4. This stone can work on most grass cutter without blade removal Specification: Size: Approx. 50mm / 2.0in Color: As the picture shown Materials: Corundum Package Listing: 1 * Lawnmower Blade Sharpener Features(balancer): 1. This product can quickly test mower cutter balance 2. It is easy to see which end of the cutter is light and which end is heavy with the balancer. 3. The cutter balancer has a simple structure and good practicability 4. Suitable for outdoor, family and garden grass maintenance using. Specification: Material: ABS Size: Approx. 60 * 50mm / 2.4 * 2.0in Packing List: 1* Lawn Mower Blade Balancer Package List