Upgrade the top, middle, and bottom three bearing drill sleeves. The higher the total height of the drill sleeve reaches 2CM, the smaller the swing of the drill bit and the more accurate the drilling is The auxiliary function of deep positioning and no wear linkage is achieved, so the top bearing cannot be fixed with a snap ring Press and hold the level dual fixture key firmly, and the thickness of the clamping plate surface can be 15-25mm When tools are in use or idle, lubricating oil should be added to the bearings to reduce tool wear and prevent rust Material: aluminum alloy colour: As shown Package Contents: 1 set 35mm hinge opener 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.