More accurate and easier to use than homemade wood preacher blocks

Adjustable for precise 5", 6", 7", or 8" exposures

Gauging block easily snaps into desired exposure position without use of tools or fasteners

Easily held with 1 hand while steadying new plank for nailing

May be used with overlap gauge for 1-person application

Tough, long-lasting, weather-resistant nylon material throughout