It's plastic so you have to be careful not to drop them but they are nice and work well. The locking mechanism worked fine for me, so I don't know why others have had issues with it. The sliders are small enough to get a good impression of the surface you are about to carve. I would buy from this seller again.
π Dioxide Controller for Digital Gas Monitoring
5 Review
π¬οΈ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
8 Review
π Enhanced Precision with Backlit Professional Manometer for Differential Ventilation
6 Review
π§ UEi Test Instruments DAFM3B Digital Multimeter
6 Review