The material of bow-shaped arm with its accessories is high-strength metal-plated alloy (not bent steel pipes and hard to deformation) which make the durability of the saw enhanced sharply,antd the cutting accuracy of the straight & curve line improved. Adopted with childproof construction, there is no risk of injury. The reciprocating saw blade only cause slight vibration & no cuts in case of finger conact. It is more safe and do not hard the hands. Technical Parameter: 1. The center distance between bow-shaped arm andd saw blade is 240mm, Thus,maximum length of material is 240mm 2. Sawing table area: 120mm X 120mm 3. The material & maximum cutting depth: hard wood(solid)-4mm, plywood-7mm, soft wood(cork)-18mm, aluminium-0.5mm, acrylic-2mm 4. Bow-shaped arm size: 46mm*270mm*300mm 5. Machine size: 180mm*240mm*170mm