Woodhaven 8715 Deluxe Stair Gauge Kit Woodhaven Deluxe Stair Guages are used to layout stair stringers, skirt boards and more. Works on stairs with an angle as low as 26, which is 4 lower than regular stair gauges can register.3/8 thick gauge body indexes against the edge of the stringer for double the bearing surface of most gauges. Not affected by the radiused edge of the stringer! Best stair layout tool ever! Our Deluxe Stair Gauges eleminate all the problems of other stair gauges like small knobs that come loose and short indexing edges that dont register against the work correctly.Our Deluxe Stair Gauges feature 1 long legs, allowing you to make a short layout line at a right angle to the tread and riser line. This eliminates guessing where the tread and riser marks intersect and makes it easy to index the square precisely to the next position. Fits any steel or aluminum framing square you supply with a blade up to .125" thick. Includes two gauges machined from solid phenolic - one for the 2 wide leg of your framing square and the other for the 1-1/2 wide leg. Easy to use large diameter knobs with brass screws hold the gauges firmly in position.Framing square not included. Includes a 24 long aluminum fence (optional use) to span voids and damaged edges. Plus it connects the two Deluxe Stair Gauges together for extra insurance against getting knocked out of position. Lifetime guarantee against defects in material or workmanship. Made in the USA!