DescriptionIf you have the ATOMSTACK R3 24W Automatic Rotary Roller, Then I think you should consider these two Extension Towers, It helps you to extend the engraving range longer.SpecificationName: R3 Support BlockQuantity: 2PCSMaterial: Full MetalPackage Size: 65 x 120 x 135mm/2.6 x 4.7 x 5.3inPa..