Product Name:trimming machine circular base, equipped with straight-line mountain support device Adjustable scale range:37-172mm (1.45-6.77inch)(fast adjustment) Two positioning modes to meet different needs: Tip hole diameter:8mm Diameter of nail hole:2.5mm(0.1inch)(milling round without breaking through the board to keep the integrity of the front of the board) Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you Colour:Red Material:Aluminum Alloy Package Contents: 1 * trimming machine circular base Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.