The Kryptonite Evolution Ground Anchor features a heavy duty hardened steel baseplate that offers great resistance against pull attacks. The 14mm special carbon alloy steel shackle provides increased resistance against cut attacks. Kryptonite Evolution Ground Anchor Features Cement anchor bolts (supplied) install directly into cement (includes masonry bits) Weatherproof Compatible with Kryptonite chains and cables Recommended for both residential and commercial applications Sold Secure Bicycle Silver