An electrofusion pipe measuring device, including a first section including a first edge and a second edge, a second section extending from the first section, the second section including a third edge arranged perpendicular to the first edge and a fourth edge, and a third section rotatably connected to one of the first section and the second section, the third section including a fifth edge and a sixth edge.

A grid pattern which includes a transparent window and handle is provided herein. Levelling and angle measurement components are provided that allow a user to determine balance and symmetry when working with subjects and the present invention. A hand held or floor stand can be used to steady the invention,

A speed square consisting of a three sided isosceles triangle that is used in the construction industry as well as the do-it-yourselfer. Consisting of a lead side of a 90 degree angle, a hypotenuse side with a scale of angular degrees ranging from 5 degrees to 90 degrees. The third side and most important side has a scale of inches divided into increments of , but furthermore and most importantly the third side has a raised edge of that when utilized to be used as a safety guide in the act of cutting a straight line. This also acts as a barrier when using such instruments as a utility knife, thus reducing the risk of injury to the hand or fingerers.

An angle measurement apparatus for use with a panel such as siding is provided. The apparatus includes a base portion defining a locating feature that is engageable with a reference feature on the panel. An arm portion is rotatably mounted with respect to the base portion such that the arm portion is selectively rotatable with respect to the base portion about an axis. The arm portion can thus be rotated to form a desired angle with the base portion, and, correspondingly, with the panel.

A foldable ruler includes a first ruler segment, a second ruler segment pivotally coupled to the first ruler segment, a third ruler segment pivotally coupled to the second ruler segment, and a fourth ruler segment pivotally coupled to the third ruler segment. Each of the first, second, third, and fourth ruler segments includes a first side surface and a second side surface opposite the first side surface. At least one of the first and second side surfaces includes a first set of indicia representing units of measurement. Each of the first, second, third, and fourth ruler segments also includes a top surface extending between the first and second side surfaces. The top surface of the fourth ruler segment includes a second set of indicia representing a plurality of angles.

An adjustable angle-measuring device comprises first and second linear arms, a marking member, an arcuate tracking member, a locking element, and at least two support channels. The first linear arm comprises first and second ends. The first end of the first linear arm is rigidly attached perpendicular to a first end of the second linear arm. The marking member is detachably attached to an intersecting surface of the first and second linear arms to form a pivot. The marking member moves along the arcuate tracking member to determine an angular measurement between the first linear arm and the marking member and the second linear arm and the marking member. The marking member comprises a locking element to lock the marking member to the arcuate tracking member. Each of the support channels are positioned at the second ends of the first and second linear arms to detachably attach extension members.

An inspection and measurement device includes a body defining a first planar face within a first bounded area, a first reference feature disposed on the first planar face within the first bounded area and corresponding with a first measurable parameter, and at least a second reference feature disposed on the first planar face within the first bounded area and corresponding with a second measurable parameter. The first and second reference features are positioned within the first bounded area for placement adjacent an element bearing the respective one of the first and second measurable parameters. The first and second reference features overlap within the first bounded area in at least one direction.

One or more clamping aid tools for mounting to various squares and straight edges, including carpenter squares, framing squares, speed squares or the like, and various straight edges and rulers for easily and accurately positioning various objects, either flat and/or round, magnetic or not. The clamping aid tools can secure these squares and straight edges to various objects while they are being fitted, secured and/or welded together.

An instrument for establishing orientation of a pelvic prosthesis comprises a hub, a first arm attached to and extending from the hub, and a second arm attached to and extending from the hub. The first and second arms define a nominal plane of the apparatus, and may extend from the hub at an angle relative to each other. Distances between the first and second legs and between the first and third legs are adjustable. The first, second, and third legs have tips, and the tips of the first, second, and third legs define a plane having a predefined geometric relationship to the nominal plane of the apparatus.

The invention is a tool for measuring the distance and angle between two points on two surfaces to measure position of the points and surfaces relative to one another to provide the user with angle and distance measurements which fully define the relationship between the surfaces and points without additional calculations.