Feature: 1. Compact size and light weight, easy to operate. 2. Four different specifications of blade heads can be used in different situations. 3. The threaded design spring has high hardness, compactness, and prevents the spring from falling off. 4. Press switch design, one click starting, simple to use. 5. The handle has antislip design, making it easy to operate and comfortable to work with. 6. FilterInlet to prevents dust from entering and damaging the machine. 7. The speed control switch can adjust the strikes speed as needed. Specification: This set of tools can be used for walls, concrete shovels, hammers, and chiseling of alloy door and window, with a wide range of applicability. Features: Compact size and light weight, easy to operate. Four different specifications of blade heads can be used in different situations. The threaded design spring has high hardness, compactness, and prevents the spring from falling off. Press switch design, one click starting, simple to use. The handle has antislip design, making it easy to operate and comfortable to work with. FilterInlet to prevents dust from entering and damaging the machine. The speed control switch can adjust the strikes speed as needed. Specifications: Blade shank: circular, hexagonal (optional) Main material: alloy Shank diameter: 10mm Blade length: 125mm Inner diameter of AirDuct: 3/8in Speed: 4500rpm Consumption: 114L/min Working pressure: 6-8kg Stroke: 25mm Spring: 1/4in Package size: 203 * 165 * 57mm / 8.0 * 6.5 * 2.2in Package weight: 1520g / 3.4lb Packing List: 1 * Host 1 * Spring 4 * Blade 1 * Connector 1 * User Manual Package List: 1 * Host 1 * Spring 4 * Blade 1 * Connector 1 * User Manual