In a general aspect, a construction tool can include a template portion arranged in a first plane. The template portion can include a rectangular plate having a slot defined, the slot being angled with respect to an edge of the plate and configured to facilitate marking a cut line on a construction material. The construction tool can also include a base portion arranged in a second plane, the second plane being orthogonal to the first plane. The base portion can include a first portion disposed on a first side of the plate, and a second portion disposed on a second side of the plate of the template portion that is opposite the first side of the plate. The first portion of the base portion can have a first thickness, and the second portion of the base portion having a second thickness that is different than the first thickness.