Easily between bits in seconds! Swivel flips and locks from drilling to driving. Works with your drill. Drilling to Driving in half of the time. Size markings on each drill provide convenience and accuracy. Maximize efficiency with the included adapter that allows you to between different sizes easily. Features - Color: Black. - Material: Steel. - Size: 7.00 x 1.20 x 1.20cm/ 2.75 x 0.47 x 0.47 inch. - Durable taps are made of high speeds steel, which can ensure sharp, fast execution and retain strength and efficiency. - The surface is treated with alloy, which greatly improves the cutting performance of the drill, is more wear-resistant and prolongs the service life. - The product portfolio includes metric sizes, so it has high versatility. - Each tap drill is engraved with a label, which is convenient for you to choose the size that suits you. - The split point tip and design increases cutting speeds while easy self centering prevents walking. Package list: 4 x drill bits 1 x wrench