Longacre 50556 Tire Gauge Longacre Tire Durometer and Tire Tread Depth Gauge Set with Carrying Case (Longacre Part # 50556) Features: | Durometer: &gt; Racing tire hardness tester &gt; Tire hardness changes as tires get older and even varies between new tires &gt; Durometers can keep track of exactly where your tires are Allows precision; no guessing &gt; Reads from 0-100 points &gt; Sold individually under Longacre Part # 50540 Tread Depth Gauge: &gt; Super accurate, easy-to-read, easy-to-use &gt; Calibrated in 1/32" &gt; Accurate to 1/128" (less than .010") &gt; Measures from 1/32" to 14/32" (7/16") &gt; Sold individually under Longacre Part #50560 Carrying Case: &gt; Hard outside &gt; Foam padded inside &gt; Great for carrying and storage