Noga Part # MG10533 <li>Holds 3/8&quot; and dovetail</li> <li>Noga has developed a unique fine adjustment mechanism which is placed on the magnetic base. This mechanism allows the hand to rest on the base rather than on the clamp of the indicator. Zero setting becomes faster than with any other mechanism.</li> <li>Unique single direction fine adjustment at base</li> <li>Powerful 176 lbs. holding power on/off magnetic base with fine adjustment</li> <li>Central locking mechanism with Noga designed spring loaded bearing</li> <li>Five axis holder</li> <li>Instant fixation at any position</li> <li>Black finished arms</li> <li>Bottom arm length: 5.26&quot;</li> <li>Top arm length: 5.24&quot;</li>100% Satisfaction Guaranteed! <p></p>