Cheston Angle Grinder 850W Yellow Grinder Machine Auxiliary Handle with Cheston Electric Chainsaw Bracket Adapter Set for Angle Grinder Machine Woodworking Tool with 5 cutting wheel LOCK-ON SWITCH & MORE: The machine is equipped with lock-on button that provides user comfort for extended-use applications. It has also a two-position side handle which is angled to an ideal position, providing maximum operator comfort along with spindle lock for quick and easy disc changes. CONVENIENT & DURABLE: Cheston Angle Grinder features a heavy duty metal gear case that assures its durability and longer life. It is portable and has a supremely finished design that prevents dust and debris from entering the inner mechanism. It offers two-handed operation and easily grinds cuts and sharpens the surfaces. This Chain Saw Chain saw size : 11.5 inch Bracket Set fits the 100 angle grinder and the grinder included in the package with 5 cutting wheel Usage: When you want to tighten the chain or loosen the chain, first you need to loose the hex screws on the black board and then you could loose or tighten the cheek screw with the screwdriver bit, when you feel the chain is suitable for your work, you could fix the hex screw again and then use the chain saw Its input power depends on your own 100 angle grinder, so it is not certain number. The chainsaw runs smooth, this allows the user to save their strength and work longer, effectively improve the efficiency of your work.