The multifunctional hand drill GBM340/GBM345/GBM400KL for professional home improvement Screwing and drilling in one machine, easy to fix and install Screwdriver/drill/powerful/safe/easy to use Self-locking chuck or metal chuck Self-locking chuck: can be tightened manually for quick and easy installation. Metal chuck as standard: good grip, does not fall off easily but requires a key for tightening. Versatile: fixed assembly, screwing, drilling in wood/metal/glass, etc. Screwdriver function Simple and practical: for screwing and unscrewing plastic, wood and metal sheets Electric screwdriver for easy screwing and unscrewing, dovetail screws, all kinds of common screws. Flat drilling function Easy drilling: for drilling holes in wood, metal, tiles, lightweight concrete Hole drilling, easy and durable, max. drilling diameter mm (mm), wood / 20 tiles / 10 metal / 10 Infinitely adjustable speed - press-type speed adjustment for easier speed control Forward and reverse adjustment - screw up