The JET Tools JEDG-1WO digital drum gauge measures brake drum wear while the wheels remain installed. Built in stainless steel for professional use, this wheel-on instrument provides a digital measuring range in both inches and millimetres. Its four-button panel lets the operator switch power, set zero wherever needed, change measurement units instantly and hold a reading. A custom wood case is included with the gauge.

• Measuring range: 0 - 17" (0 - 430 mm).
• Measurement increments: 0.0005" / 0.01 mm.
• ON/OFF power control and SET control for zeroing at any position.
• MM/IN control for instant S.A.E./Metric conversion, plus data hold.
• Model: JEDG-1WO; SKU: SUW-310605; product number: 310605.