The Bosch GBM13-2 Professional Drill has two powerful gears for challenging applications. It has a high precision chuck that is secured by a centring screw to stop it coming loose in reverse rotation. There is a synchronised 2-speed draw key transmission, allowing switch over during operation as well as a drill spindle with a hexagon socket for direct insertion of screwdriver bits. This drill has a European standard spindle collar diameter of 43mm to allow its use in drill stands & is fully ball & roller bearing-mounted.