Check the listing for details. Bolt-Rivet-Screw-Drill-Size Gauge Checker with Drill & Tap Combo Gauge. Condition: New. Listed at 18.99 USD. Screw, Rivet, Drill & Tap Gauge (3-N-1 Combo Gauge) These gauges are made of hard, durable industrial grade plastic. You get all three for one low price! PLUS FREE SHIPPING to all 50 States! Rivet Gauge - Red Measures Pop Rivets & Blind Thread Inserts 5" Ruler Screw Gauge - White - Internally Threaded - Just thread bolt into gauge to get size and thread pitch This is the easy way to find bolt sizes! Range: (#0 - 3/4") Course & Fine Thread Also Metric Sizes (1.6mm to 16mm) Drill & Tap Gauge on the Reverse Side! Drill & Tap Gauge Drill Bit Gauge - Blue Inch & Metric Diameters 7-1/2" Ruler Can't read the size on your drill? This is what you need! All 3 gauges are riveted together so they stay together in your tool box.