Step and gap measuring instrument

Step and repeat apparatus

Step and repeat apparatus

Step layout device

Straight edge apparatus for laying ceramic tile

Straight line shingle

Straightness measuring device

Striker alignment tool

Stringer check fixture and method

Strip shingle alignment tool

Structural framework detailing tool

Structural member alignment tool and method of using same

Structural member spacing tool

Structural surface measuring and aligning apparatus and method

Structure of an overlay mark and its dosimetry application

Structure of isometric ellipse scale

Structure of plate positioning arrangement

Stud alignment and positioning tool

Stud layout template

Stud marker