Jaw Mounting Type: 0.059/1.5mm x 60 Degree Serration. Lathe Chuck Size: 12. Groove Width: 0.827/ 21mm. Screw Size:0.63/16mmx2P. Hole Space: 1.181/ 30mm. Jaw Height: 2.638/67mm. Jaw Width:1.97/50mm. Jaw Length:4.25/108mm. No of Holes: 3. No of Step: 3. First order height:1.38/35mm. Second order height:0.63/16mm. Third order height:0.63/16mm. First order length:1.93/49mm. Second order length:0.79/20mm. Third order length:1.54/39mm. The mechanical products need to be tested to see if the accuracy is qualified. There will inevitably be scratches, which will not affect the normal use. You can make order with no worries. Any concerns just feel free to let us know, we’ll reply in 24 hours in normal condition. Orders are processed from Monday-Friday; Not on the weekends & public holidays.