7" Rafter Speed Square Precast R value of this insulation

R value of this insulation is R8

quick-setting

AC the art of concrete 30% Penetrating Sealer must be applied to dry

Battery 1 Amp-Hours

PSC Metallic Fusion

7" Rafter Speed Square Precast R value of this insulationThis 7" Johnny Square is a versatile tool for builders and contractors. Its thick edge is useful as a saw guide it can be used directly with the saw against the square for cross cuts or angled cuts using the etched protractor scale. It can be used indirectly as well, using the scribing notches to create a saw cut line for rip cuts. The Johnny Square also simplifies stair layout its integrated distance and angle scales let you quickly and accurately