Martindale, OSMFD0312, Type SMF - Copper Slitting Saw 3" OD, 1/32" Frac 0.0312" Dec Used for cutting rolled Aluminum and Copper - materials that produce long, stringy chips Features: M-2 High Speed Steel Hollow Ground for Side Clearance Alternately Beveled Teeth Ground and Landed Teeth Rake Angle of Teeth: 10 Degree Positive