The Milwaukee 6" Measuring Wheel was designed for extreme durability， increased ergonomics， and productivity. Constructed of reinforced aluminum frames and reinforced folding joints， the Milwaukee measuring wheels are able to withstand the toughest Jobsite conditions. Durable locking pivot points help quickly fold the units for transportation and storage. The pistol grip handles， are designed to provide similar ergonomics to that of a power tool handle， fitting the hand of the user better than other wheels on the market. These handles feature a top brake function that can be used to 'lock' the wheel and the reading， increasing accuracy.