180 Degree Protractor Stainless Steel Angle Gauge Adjustable Multifunction Semicircle Ruler Mathematics Measuring Tool

180 Degree Protractor Stainle Steel Angle Gauge Adjustable Multifunction Semicircle Ruler Mathematics Measuring Tool

Feature:Unparalleled accuracy:Just pre the head to the desired angle, and then pre the straight line.The head can be adjusted from 0 to 70, firmly locked every 5 (plus 22-1/2 and 67-1/2).Woodworkers Edge Rule:The secret of TTKJ T-Square lies in a series of precision-hined index holes and spring loading,Close tolerance indexing pins that mesh with them. The pin snaps into place, giving you confidence to know that it is accurate.Three sizes are available: 10 inches, 15 inches or 20 inches.Both edges of the blade are laser engraved with 1/32? inch graduations. Increment.The total ulative error of the scale over the blade length is kept within a tolerance of 0.004".The thin satin-finished stainle steel blade is easy to read and minimizes parallax errors.The perfect woodworking layout tool:The blade has the same unique serration.The design line notch was found in the new stainle steel precision woodworking block.There is a notch every sixteen inches along the blade.Just put the pencil in the notch and slide the t of the pen along the edge of the barrel to form a perfect parallel line.Specification:Material: metalColor: sierSize: 10 inches, 15 inches, 20 inchesWeight: about 160g, 190g, 210gMeasuring range: 0-70 degreesMeasurement accuracy: 1mmType: Angle rulerPackage :1*Woodworkers Edge Rule

About shping
Shping and Pack All it will be double checked and well packed before sending.It will be dispatched within 2 business days after buyers pay for the order. It usually takes about 14 to 18 working days for delivering the package to the destination(for e areas,it may take a little longer). 

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