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data-bvcsref="http://answers.grainger.com/answers/5049-en_us/product/1MKN4/subscribeanswers.htm?format=embeddedrpc&contentid=38660&answers=true&user=__USERID__&authsourcetype=__AUTHTYPE__" data-bvtrack="eventTarget:Product,eName:ProductFollow" data-bvcsappcode="qa" name="BV_TrackingTag_Question_Display_SubcribeContent" class="BVDILink BVDI_CSSubmitLink" data-bvcssubjectid="1MKN4" href="javascript://" data-bvcssubjecttype="product"><span class="BVDILinkSpan">I have this question too</span></a></div></div> <div class="BVQAQuestionAnswerDivider"><h2 class="BVQAQuestionAnswerDividerHeading">Answers </h2></div><div id="BVQAQuestion38660Answers" class="BVQAAnswers"><div id="BVQAAnswer38792" class="BVQAContent BVQAAnswer BVDI_BAContentTechSupport"><div class="BVDI_BA BVDI_BAAnswer"><div class="BVDIInside BVDI_BAInside"><div class="BVDIBody BVDI_BABody"><ul class="BVDI_BAList"><li class="BVDI_BAItem BVDI_BAItemOdd BVDI_BAItemTechSupport"><a onclick="return false;" class="BVDILink BVDILinkDisabled" title="Tech Support" id="BVDI_BABadge_ifp8e4zsg6h2dz9ksy8a08kta_ID"> <span class="BVDILinkSpan">Tech Support</span></a></li></ul></div></div></div><div class="BVQAContentText BVQAAnswerText"><div class="BVQAContentLabel BVQAAnswerLabel">Answer: </div>Grainger has contacted the product supplier and have been advised by them of the following:<br />Grainger part number 1MKN4 is designed for grinding, drilling, tapping, milling ferrous metals. This is NOT recommended for brass, copper, and bronze; and has limited use with aluminum, and titanium. Grainger offers part number 1MKL1, which will be more general purpose use for similar applications, please note that with non-ferrous metals, could stain the finish if exposed too long, or not diluted properly. It is recommended that you call Grainger Tech Support in Metal-Working and specify the application environment for more details.<br /><br />Thank you for using Grainger Ask and Answer</div><div class="BVQAContentData BVAnswerData"> <div class="BVQAElapsedTime">10 months ago</div><div class="BVQASignature"><div class="BVQAWrittenBy">by </div><div class="BVQANickname"><a title="Read all my Q&A" data-bvtrack="eName:ProfileLink" onmouseout=" bvProfileSnapshot.hideOpenPopinAfterDelay(1000 ,250 ); " name="BV_TrackingTag_Answer_Display_ReadAllQA_BobM" class="BVQANickname" onclick="var popupWin = window.open(this.href, null, 'resizable=1,status=1,scrollbars=1,width=800,height=600,top=0'); popupWin.focus(); event.preventDefault?event.preventDefault():event.returnValue = false;" href="http://ugc.grainger.com/profiles/5049-en_us/BobM/profile.htm" onmouseover=" bvProfileSnapshot.showHiddenPopinAfterDelay('BVDI_PSPopin_5ypv15oafr024bifxbxzfkzk6_ID', 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