CO-Z Electric Chainsaw Sharpener Kit Chain Saw Blade Grinder - with 2 Grinding Wheels, 1/8-Inch-by-3/16-Inch TONS OF ADJUSTMENTS, chain grinding angle adjustable between 0 to 30 while the motor can be adjustable from 0 to 70, perfectly accommodating different sharpening needs for different chainsaws EASY TO OPERATE, after securing fixing the sharpener, use the chain cutter to firmly secure the chain to be ground (rotate the knob using part 10 as shown in the picture), then press down the handle it will start grinding ACCURACY & PROTECTION, the built-in work light improves accuracy; extra-thick chain cutter along with aluminum casing to prevent splashing iron filings A COMPLETE COMBO, comes with two durable grinding wheels for your convenience, 5.5 in. of diameter and 1/8 in. and 3/16 in. of thickness respectively DURABLE, solid cast aluminum construction with reinforced hinges to ensure sturdiness and outstanding performance The built-in work light gives you a precise and accurate angle of cut every time; Extra-thick chain cutter along with aluminum casing prevents splashing iron filings. Chain grinding angle can be adjusted between 0 to 30 while the motor can be adjustable from 0 to 70 perfectly accommodating different sharpening needs for different chainsaws.