(20 pcs) 3/8"-16 Premium Zinc Plated Carbon Steel Drop in Anchors Assortment, Knurled Drop-in-Anchor for Solid Concrete, Internal Forced Expansion Screw Bolts

[Package Include]: In this package, you can get 20pcs 3/8"-16 premium zinc plated concrete knurled drop in anchors, sufficient quantity can fully meet your different needs. [RELIABLE AND DURABLE]:Our knurled drop-in-anchor are made of high quality iron and zinc surface, corrosion and rust resistant, making this drop in anchors more durable. The iron material is strong and powerful and can be fixed on concrete very firmly. [Function] 3/8" Inch premium iron material knurled drop in anchors: 1-9/16" hole depth and 1/2" hole diameter, use with 3/8-16 bolt. [Common Use]: The knurled drop in anchors are greatly ideal for solid concrete, can be used for anchoring into solid concrete. They are commonly used with machine screws, bolts and threaded rod to anchor fixtures to concrete and other masonry materials. [Installation Steps]: First, you need to pre-drill a hole; second, install crimped knurled side down in a pre-drilled hole; third, need the set tool, insert the thinner part of the tool into the anchor and the back is struck with a hammer to make sure anchor are properly secured, which can cause the anchor to expand and embed itself in the concrete for a tight fit.