3/4 in. Brass Stair Gauges (2-Pack)

A:  These are designed to work with all Empire framing and rafter squares. - Social Team

A:  I've never seen a set with a bearing in it but I would assume that it is for ease of movement against your stringer edge when setting your gauges to your rise and run numbers.

A:  I am self taught - answer may not be exact. This is what I did - On several measurements I use all the time - I drilled a small hole in my square - allowing the gauge w/ bill bearing to find the “exact spot” every time.

A:  that is what holds it tight when you turn the set screw

A:  the are tightened at the exact measurement you set them to for multiple layouts to insure all are the same; stair stringers, rafter cuts, or any repetitive cut that needs to be exactly the same

A:  These tighten onto a framing square by tightening the thumb screws, thus clamping it onto the blade of the square. These are a number of detailed 'How To" on the internet. Search "How To Use Stair Gauges" for detailed use instructions. As for mounting, this is done with the thumb screws on the brass gauges to the blade of a framing square.

A:  Screw them onto a framing square once you know your rise and run (such as for stair stringers). This allows you to make multiple copies of the same angle time and time again (once you set them and screw them tight into your square that is).

A:  They screw on your framing square to mark the rise and run of your stringer. They give you a repeatable measurement.

A:  When you screw out the holding screw and slide the gauge to where the flat surface of the slot rest against your framing square then you use your flat surface of the gauge that's on the top part of the square to line up with the number for your rise or run whichever your setting, once lined up on the square with the number then tighten down the holding screw to lock it in place keeping the gauge flush against the square edge at the slot, then repeat same with the other measurement and your done. Double check your rise and run measurements from the 90degree corner of the square back to the flat edge on top of square that is locked in on your measurement on the square, lay your square top side up and let gauge rest flush against edge of 2x12 stringer and mark your rise and run onto the stringer, then slide square down to where your gauge and square line up with the mark leading to you next step in the stringer and repeat this till you get all rise and run for steps marked out on the stringer and your ready to cut out your steps. I always cut to the angle mark on the rise and run intersection and then use jig saw or sawzall to finish out my cuts. I hope this helps you out.