Digi-Pas 6 in. 2-Axis Smart Master Precision Level Bluetooth 0.0002/feet (0.02 mm/m) DWL1500XY - The Home Depot
DNYSYSJ 6 Inch Master Precision Level In Fitted Box for Machinist Tool 0.0002''/10'' - Amazon.com
Nakkaa 12 Inch Master Precision Level with Wooden Box Accuracy 0.0002"/10" for Checking the Straightness Parallelism The Surface of Machine Tools Equipment - Amazon.com