You’re hundreds of feet above the ground or miles deep into a cave and you need to drill a hole in solid rock for an anchor — what are you going to use? Petzl made the RocPec SDS drill holder for just these situations.
The RocPec accepts standard SDS drill bits so you can drill holes of varying diameter, but Petzl recommends a 10 or 12mm bit. You can easily change bits without tools by pulling the driver’s handle apart and sliding the bit into the chuck.
The drill holder itself is $65 and includes a leash. The Petzl SDS bits are about $50, but you should be able to find another brand cheaper.