This small table saw can be used directly, but to DIY, you need to assemble it yourself. - Overall motor speed setting, even without high speed, but large torque. - Extended power supply, all 12V DC SUPPLY can be directly powered, and work perfectly. - It provides great help to use, and it is faster and more convenient. - Can be used for various applications of deviated debris, including PCB design, etching, polishing, Cutting, woodworking, remote control models, robots, home and gardening, and so on. Note: -Do not tighten the bolt and rotate at high speed in the opposite direction of the bolt To avoid unnecessary problems when falling, or cover with a protective cover. The product set includes: 1 x Saw Blade Connection Rod 1 x Fix Wrench 14 x 15mm 1 x Screws 1 x Allen key 2mm 1 x flange nut spanner