Size:  3/16x7/8  1/4x3/4  1/4x1  1/4x1-1/4  1/4x1-1/2  1/4x2  Or  M6x30  M6x40  M6x50  Installation Introduction:  1. Drill a hole with proper size through object to be fastened  2. Insert the Hammer Drive Anchors,  3. Set by driving expander pin into head  The other Zinc Alloy anchors:  Hammer Drive Anchor  Single/Double Expansion Anchor  Lag Screw Shield  Easy Drive Anchors/Speed Plug  Lead Wood Screw Anchor  If you interest in our products, please don't hesitate to contact us to know further informations.