Product Info Catalog Tools Hand Levels & Measuring Brass Stair/Square Gauge Set Brass Stair/Square Gauge Set Request a Quote UPC: 49448405008 SKU: 503894 Model Number: 405 Brass Stair/Square Gauge Set, Contractor Quality, Machined Solid Brass With Knurled Screws. Flush mounted thumbscrews Used for repeat angle cuts for stairs & rafters Attaches to standard framing/carpenter squares