An adjustable jig for a sheet metal brake including a first arm configured to mount to the brake, and an adjustable backstop affixed on the first arm. The adjustable backstop is set at an adjustable first distance from a front face of the brake when the first arm is mounted to the brake. A first adjustable front stop can be configured to engage the first arm and retain an adjustable first front stop position relative to the first arm. A second adjustable front stop can be configured to engage the first arm and retain an adjustable second front stop position relative to the first arm. The first and second front stops are independently adjustable relative to the first arm. A sheet metal brake with an adjustable jig. A method for bending sheet metal with a sheet metal brake and an adjustable jig.