Zinc alloy hammer drive anchor Anchor size:3/14X7/8-1/4X3 & ... High quality,fast,easy to use Zinc Alloy Hammer Drive ANCHOR is a fast,easy-to-use expansion anchor ... using 200-250kgs/cm2 concrete(no aggregate).A safe working load should not exceed 25% of stated value.Size:3/16X7 ... anchor, metal frame anchor, bolt anchor, zinc alloy hammer drive anchor, express nail anchor, kinds of plastic anchors, and ...