The HKS Products GL942 is a magazine speedloader designed for Glock +2 magazines on models 17 and 22. Its use simplifies and accelerates the loading process. To load, simply insert the magazine into the ergonomic handheld loader, press the thumb lever down, and load up to full capacity. Please note that this speedloader is designed specifically to fit Glock 17 or Glock 22 +2 magazines. Other models may not be compatible.