1. Economic pencil type 2. more styles for selection 3. 4-sided or 2-side scale 4. Ideal for cars and light truck SMT1162-Straight head tire gauge·Chrome-plated zinc head, metal tube·2 or 4 side plastic bar·Pressure range: 10-50 psi or 10-100 psiSMT1191BPencil tire gauge·Chrome-plated plastic head, metal tube·2 or 4 side plastic bar·Pressure range: 10-50 psi or 10-100 psiSMT1193BPencil tire gauge ...