This is the factory Daniel Defense H9 magazine in 9mm, holding 15 rounds and designed specifically for the DD H9 semi auto pistol. The carbon steel body is coated in black oxide for corrosion resistance, and a smooth isotropic super finish on the interior reduces friction for faster, more reliable insertion and extraction under recoil.Tool free disassembly makes cleaning and maintenance straightforward, an advantage over sealed magazines that require drifts and punches. The H9 is a relatively low volume pistol so factory magazines are the surest bet for fit and function, and stocking up on spares is recommended for anyone running the H9 as a primary carry or range gun. Fits only the Daniel Defense H9.