Features. Size 18DXS. Drill size none. Grip range 18 to 14. Body length 34. Screw length 138. No predrilling necessary. When anchor is fully expanded spiderlike legs draw tightly against backside of the wall. Two prongs on the head of the shell prevent the anchor from rotating during expansion. Ideal for use in drywall paneling plywood block and more. Box 100. Box of 100Specifications. Dimension 2 H x 34 W x 33 L. Weight 1 lbs