CMC Products Power Magazine, 45ACP, 8 Rounds, Fits 1911, Stainless M-PM-45FS8 Power Mags are lean and sleek" yet they are extra-heavy-duty with increased reliability and service life. A unique all-steel follower design yields the lowest possible bearing surface for long-lasting function in dirty environments when ongoing cleaning and maintenance may not be possible. The unique follower design also functions as a spring" which allows the high tensile rocket wire spring coils to be the largest (side to side" front to back" and top to bottom) of any .45 caliber 1911 magazine.