This is probably the most accurate and user friendly scanner/thorn finder I have ever used. It is ready to use in a few seconds after switching on. It may seem a bit pricey, but given the number of spike finders I've bought over the years in a bid to find the "best," my search is probably over, which will eventually result in savings.
Triangle Group TR918 225/45 R18 95V summer
61 Review
π CAMWAY 6 Inch Digital Caliper with LCD Display, Electronic Vernier Caliper, 150mm Stainless Steel Feeler Gauge, Plastic Digital Caliper Set for Zero Setting Inside/Outside Diameter, Depth, and Step Measurement Tool
3 Review
π Johnson Level and Tool 400EM-S 12-Inch Heavy Duty Metal Combination Square for Professionals, with Inch/Metric Measurements, Silver - 1 Square
8 Review
TV bracket Kromax DIX-18 black
52 Review