Cutting torch guide structures, systems, and kits include a base structure having a bottom surface and a channel formed in the base structure, a mechanically switched permanent magnet coupled to the base structure and configured to mechanically switch between two magnetic states, and a cutting torch guide structure configured to be releasably received in the channel and magnetically coupled to the base structure by magnetic attraction between a at least one permanent magnet fixed in at least one recess in the channel and a guide structure permanent magnet fixed to the cutting torch guide structure, where the cutting torch guide structure is configured with a first portion that is removable received in the channel of the base structure and a second portion that overhangs the base structure and includes an edge that defines a predefined shape and is configured to be in slidable contact with a cutting torch tip.

Cutting torch guide structures, systems, and kits include a base structure having a bottom surface and a channel formed in the base structure, a mechanically switched permanent magnet coupled to the base structure and configured to mechanically switch between two magnetic states, and a cutting torch guide structure configured to be releasably received in the channel and magnetically coupled to the base structure by magnetic attraction between a at least one permanent magnet fixed in at least one recess in the channel and a guide structure permanent magnet fixed to the cutting torch guide structure, where the cutting torch guide structure is configured with a first portion that is removable received in the channel of the base structure and a second portion that overhangs the base structure and includes an edge that defines a predefined shape and is configured to be in slidable contact with a cutting torch tip.

A hole cutting apparatus for cutting a hole in a tubular structure, which includes a center shaft, a slide mount rotatably attached to the center shaft, a slide rail slidably attached to the slide mount; a cutter attachable to the slide rail so as to move with the slide rail, and a cutter height roller attached to the cutter. The cutter height roller is structured and arranged to maintain the cutter at a distance from a cutting surface of the tubular structure as the hole is cut.

An attachment to fit to a nozzle portion of an oxy-fuel torch that enables an operator to precisely cut a circle in a metal without having to move during operation is disclosed. The attachment includes a nut threadably attached to the nozzle portion that in turn holds a brass bushing that is concentrically and coaxially arranged inside a bearing within a bearing retainer. Further, a torch radius adjustment arm retainer is slidably locked to the bearing retainer via a dovetail joint and is configured to slidably receive a long arm of an L-shaped radius adjustment, further secured by a first thumb screw. The operator cuts the circle having a radius equal to distance between the nozzle portion and a replaceable radius pivot point threadably attached at end of a short arm of the radius adjustment arm by pivoting on said pivot point and rotating the torch in the circle.

The Adjustable Circular Burner Attachment is a device that attaches to double-barrel burning torches to give an operator the ability to cut circles into steel or other metals. The attachment is adjustable to allow for different size circles to be cut. The attachment gives added stability for better quality cuts and a safer environment for the operator by becoming a part of the burning torch.

A hole cutting apparatus for cutting a hole in a tubular structure, which includes a center shaft, a slide mount rotatably attached to the center shaft, a slide rail slidably attached to the slide mount; a cutter attachable to the slide rail so as to move with the slide rail, and a cutter height roller attached to the cutter. The cutter height roller is structured and arranged to maintain the cutter at a distance from a cutting surface of the tubular structure as the hole is cut.