The AdirPro Pole Peg Adjusting Jig is a convenient tool for adjusting and calibrating pole vials in an office setting. The adjusting jig features an L-bracket so that you can rest a prism pole point on it. It also has an adjustable top piece that can center your pole before adjusting the bubble. When not in use, you can easily store it in a drawer, cabinet, or carrying case. Anyone can handle the adjustable jig with a weight of .44 lbs., and it is user-friendly. The AdirPro Pole Peg Adjusting Jig is constructed from steel, ensuring a lasting investment.