HKS 450 Large Caliber Single Stack Magazine Speedloader Capable of loading 15 rounds in 18 seconds Loads single stack magazines Magazine slips into loader and is held in by hand Thumb lever Fits Colt All 7 round magazines, Many 8 round/Llama .45 ACP/ Auto Ordnance 1911-A1, Pitbull/Springfield 1911-A1/Safari Arms GI, Matchmaker, Others