Hyjoy 868 Screw Expander with 84299 Drill Part for Caulking Size 1/4" 20

Designed for use with caulking size 1/4" 20, the Hyjoy 868 screw expander is supplied with the 84299 drill part for reliable installation. Purpose: allows fast, safe setting of expansion screws into masonry, suitable for anchors of varying thickness. Usage: attach the 84299 drill part to the expander, place the assembly into the prepared hole, tap the exposed end of the expander, then unscrew the tool to complete the setting. Required hole dimensions: drill a hole with a 1/2 inch diameter and 7/8 inch depth. Please confirm the model number before purchase.