Clockwise Tools MMSR-01 Premium Outside Micrometer Set with Carbide Tip 0-3" Measuring Range 0.0001" Graduation Precision Machinist Tool <span class="a-text-bold">Clockwise Tools MMSR-01</span> Digital Caliper is a premium quality outside micrometer set. It is highly recomended for home DIY using as well as professional using. Please <span class="a-text-bold">NOTE</span> that<span class="a-text-bold"> IN ORDER TO OBTAIN A MORE ACCURATE MEASURING RESULT, PLEASE USE A SMALL PIECE OF PAPER OR PAPER CARD TO CLEAN THE HARD CARBIDE MEASURING TIPS EVERYTIME BEFORE USING!</span> Clockwise Tools MMSR-01 0-1&#034;, 1-2&#034;, 2-3&#034; three micrometers Grey box Two adjust wrenches 1&#034; calibration standard and 2&#034; calibration standard Measuring Range: 0-1&#034; Accuracy: 0.00015&#034; Graduation: 0.0001&#034; Hard Carbide Tips Single Hand Ratchet Handle Design for Precise Application of Force Measuring Range: 1-2&#034; Accuracy: 0.00015&#034; Graduation: 0.0001&#034; Hard Carbide Tips Single Hand Ratchet Handle Design for Precise Application of Force Measuring Range: 2-3&#034; Accuracy: 0.0002&#034; Graduation: 0.0001&#034; Hard Carbide Tips Single Hand Ratchet Handle Design for Precise Application of Force