Measurement Tool,HAUSBELL Layout Tools Template Tool Ruler for Builders, Handymen, Crafts Unique design. This slotted ruler can hold together with locking knobs to let you match any angles and shapes. Angle Measuring Tool Helps You Get Perfect Angles Every-time. Economical layout tool. It saves time, money and effort by eliminating tedious, repetitive measures and materials made from inaccurate cuts. Easy to use. Just place the Multi-Angle template tool onto your work area, slide the rulers into the shape needed, and tighten the screws. Durable and portable. ABS material makes our Angle Finder durable to withstand any physical impact. Light weight and unique tightening mechanism for one-handed operations. Versatile tool. Perfect for builders, craftsmen, weekend warriors and DIY-ers alike, its an essential tool for any toolbox.