Winkhaus Worm Gear Replacement Parts, Gearbox for Window and Balcony Doors, Repair, Screwable, for GPM GPK GRM GRM GRK GAM GAK Series, Spare Parts for Snail Angle System: Replacement gear for damaged gear suitable for GPM, GPK, GRM, GRK, GAM, GAK, GPKES, GPKBS, GVM, GVK, GXK, GM.U, GK.U, GVM.U series.

• [Three-piece gear shift kit]: This is a new original gear assembly converted into a hand repair kit. All our gear shift parts are meticulously machined and re-lubricated.

• 【Easy to use】: The transmission lock is secured with the included threaded screws and does not require riveting.

• [Suitable for windows and balconies]: The gearbox lock features an adjustment safety mechanism that breaks and releases the gear on the first start-up.

• [Note]: The drilling rod is ready for use with the gear. If it is heavily worn, the gear may no longer grip correctly and move safely. Debugged by the brand for perfect fit and reduced delay.