This dedicated thumb support from Leica is a great bit of kit for anyone looking to improve the ergonomics and comfort of their M10 camera system. To attach, simply slide the device into the hot shoe - providing you with a more comfortable thumb rest and a steadier, more secure grip. This further allows for more efficient one-handed camera operation. Adhering to Leica's well-known vintage styling, this Thumb Support is constructed from brass and features either a black or silver finish that will compliment your unique M10 camera setup.