About this 3D model

Wall fixing expansion screws need to be printed with PETG Suitable for 10mm drilling, depth 30mm. The diameter and expansion effect of the applicable screw are shown in the picture There are two other styles, sturdy and do not need support structure. There are small spines on the sides for more secure fixing. Insert into the drill hole and hammer in Suitable for concrete walls, brick walls, not suitable for hollow brick or tile walls