3-LAYER PROCESS TO ENSURE DURABILITY: This Angle-izer Template Tool has Premium Aluminum Alloy and Metal Bolts and Nuts to ensure will not break and deformation when working. The Unique Line Level of laser engraving are not worn. metal is durable,NEVER cry once buy once ! EASY ANGLE RULER: When you get to more projects around the house, the face of tiles, bricks, stone, wood, laminate and other materials, Then knobs are metal and hold on tight. You got a copier, to copy some odd angle on interior paneling, no longer need to repeat the measurement and mark. trace the angle and make the cut. it will work great! ACCURATELY MEASURE SHAPES AND ANGLES FOR REPEAT CUTS: Whether you are an architect, craftsmen or a big fan DIY-ERS, knurled adjustment knobs and no rusty rulers are your faithful companions that accompany you to complete the great work! PERFECT GIFT DESIGN: We put the 4 angle ruler on a special sponge mat, with a special box. Looks like a Customized gift, bring it to your husband, father and friend, this is an excellent choice! 100% MONEY BACK GUARANTEE: Enjoy risk-free purchases and self-confidence purchases. If you do not like our product - return. We stand behind all of our products, so you can return any of our products within 30 days to avoid easy refund.