Features: 1. MAKE ACCURATE MARKINGS: To ensure precise markings, this brass wheel marking gauge features an engraved graduated ruler, which shows both metric and imperial measurement values. 2. FOR EVERYDAY USE: This marking wheel gauge is built to last a life-time,thanks to its solid brass body and hardened steel cutte-r. 3. FINE CUTTING WHEEL ADJUSTMENT: The marking gauge wheel is fitted with a micro-adjustable fence with 2 thumbscrews,which will make it easier for you to take measurements with pinpoint accuracy. 4. ANT-I ROLL DESIGN: Keep this wheel marking gauge from rolling off of your work bench.It houses an ant-i roll brass fence with 2 flat spots on the head to keep the gauge from rolling around. 5. EASY TO SET: The marking tool is fitted with sturdy knobs that ensure easy adjustments.The rod features a V-shaped slot that prevents the fence and tail from wiggling or wobbling during use. Specification: Material: Aluminum Alloy+Brass+Stainless Steel. Size: About 21.7*5.95 cm/8.5*2.3 inch(Total Length * Max. Diameter). Range Accuracy: Scribing range 0-12cm, Fine tuning level 0.2mm. Package included:1 *Wheel Marking Gauge,1 * T15 Wrench..Items from Sheng Xinshun's shopProducts from KJ's store