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Feature

Heavy duty cast zinc head with black, chip-resistant e-coating finish
Auto-lock blade assembly
Stainless steel blade with permanently etched graduations 1/8", 1/16", 1/32", mm
Hardened, screw-in scriber won't fall out
Durable acrylic level vial

Description

Johnson's 420em-s combination square features a self-aligning drawbolt, etched stainless steel blade with 1/8", 1/16", 1/32" and mm graduations, heavy duty 45 and 90 precision machined square head and a hardened removable scriber. A combination square is a tool used for multiple purposes in woodworking, stone masonry and metal working. A combination square can reliably measure 90 and 45 angles. The 45 angle is used commonly in creating miter joints. It can be used to determine Flatness on a board known as the face side. It can be a rudimentary level for approximating level surfaces. A combination square can be used as a depth gauge or to transfer dimensions and the scribe can be used for marking the work surface.