Features: • 5.5mm measuring contact surface • For basic, easy access depth measurements and blind bore depths • Coolant proof, dust proof - IP67 • Bluetooth communication for error free data collection • 4" measuring base. 8" & 12.5" base attachments available • Available in 3 ranges. 8", 12" & 19" • Frame made of hardened stainless steel • Sleep mode after 20 minutes and automatic wake-up with movement