1PK Crescent EX6 Aluminum Rafter Square

2-In-1 Extendable Layout Tool features a 6 In. fold-out extension arm that eliminates the need for carrying both a 7 In. and 12 In. square. Quick access thumb lock releases the fold-out extension and locks it back into place after use. Solid aluminum construction and corrosion resistant finish for durability Laser-etched markings for visibility and durability. Acts as a continuous edge for scribing and marking large scale lumber. Lightweight and easy to store in your work pouch or pocket.; 6 inch fold out extension arm eliminates the need for a 7 inch and 12 inch square.Lightweight and easy to store in your work pouch or pocket.Laser-etched markings for visibility and durability.Solid aluminum construction and corrosion resistant finish for durability.Quick access thumb lock releases the fold out extension and locks it back into place after use.;