Dapra's series of Biax hand-held, air-powered tools include lightweight grinders and variable-speed deburring machines. The SRD 3-55/2 and SRD 6-30/2 are suitable for grinding and shaping. The SRD 3-55/2 features a low-vibration motor for fine deburring and long service life. Its rotational speed is 55,000 rpm with an air consumption of 6 cfm. The SRD 6-30/2 high-performance grinder has a 150-Watt motor and achieves a speed of 30,000 rpm. Both lightweight grinders have twist valves and are designed for easier handling to reduce user fatigue. Dapra also offers straight and angled variable-speed, hand-held deburring tools. The angular design of models BEW 309 and BEW 605 is suitable for deburring bore holes in difficult-to-reach areas, such as slanted bore holes that must be deburred from the inside. The BEW 309 has a variable speed of 0-900 rpm; the BEW 605 has a variable speed of 0-500 rpm. Both models have a lever valve and a backward air exhaust direction. The Biax BE 309 straight drilling/deburring machine deburrs bore holes up to 5.5 mm and has a variable speed of 0-900 rpm. The tool has a push-start valve for easier handling.