Aluminum Construction: combines high strength aluminum alloy body with anodized texture treated for rust proof durability while maintaining lightweight 29g portability Double Bearing Precise Transmission: delivers significantly concentricity and smooth operate, making it both a professional tool and satisfying stress reliever Ergonomic Grip: utilizes a twist curved handle that conforms to finger for comfortable and efficient force application in various holding positions Steel Flat Drill Bits: cutting power and precise, with their unique flat design completely eliminating bit slippage during use Secure Locking Mechanism: features a specially designed slot at the drilling base that perfectly fits anti slip flat drill bits, any slippage during drilling when tightened properly, Manufacturer: Oxxggkao