Features： 1、ABS Material: This product is made of ABS material, which is sturdy, durable, and not easy to wear. It can be used by users for a long time without worrying about quality issues. 2、Product Performance: This tool adopts advanced heat treatment technology and topcoat screwdriver head, and it must have a 2 cycle engine to maintain performance. It adopts a squared handle; When attempting to adjust the carburetor, it is easy to set a 1/4 turn increment on the mixture setting. 3、Tachometer Function: The package contains a tachometer that can read the current engine speed and help adjust the engine idle speed. 4、Convenient to Carry: This product is small in size, light in weight, and easy to carry and store; Users can easily take it to any place they need. 5、Strong Compatibility: It is compatible for ZAMA, for Walbro, for STHIL, for Husq varna, for Craftsman, for Poulan, for Weeeater, for Homelite, for Ryobi, for MTD, for Troy Bilt, for Toro, for Sears; It can be used to string trimmers, chain saws, leaf blowers, hedge trimmers, trimmers, pole trimmers, and any other equipment. Specification： Item Type: Carburetor adjustment tool Weight: 471.00g/16.61oz Tool Length: 15.5cm/6.10in Tachometer Size: Approx. 5.3x3.5x1.5cm / 2.1x1.4x0.6in Battery: Lithium ion battery 300mAh (tachometer shipped with built in battery) Compatibility: Compatible for ZAMA, for Walbro, for STHIL, for Husq varna, for Craftsman, for Poulan, for Weeeater, for Homelite, for Ryobi, for MTD, for Troy Bilt, for Toro, for Sears; It can be used to string trimmers, chain saws, leaf blowers, hedge trimmers, trimmers, pole trimmers, and any other equipment Package List： 14 x Carburetor Adjustment Tool 1 x Tachometer 2 x Tie Straps 2 x Screws 1 x Connecting Line 1 x Storage Bag