Durable drill bit: manufactured made of alloy steel reliable, strong, hard, durable and rust-proof. In addition, it is also very light and very easy to carry. carry; Flexible drill extension: right angle extension 105 degrees when you're in hard-to-reach places, 2-way adjustable thumb strap. 360 degrees. Can be connected à an electric drill and a wrench manual. The functional head is equipped with a locking and magnetic device to ensure that the sleeve does not fall off. The 1/4-inch hex drive shaft changes quickly and adapts to any size. most drill and screwdriver chucks. Handle Screwdriver Drill Bit Set percussion: drills 1/4", 3/8" and 1/2" hex shank are made of high quality steel, suitable for installing pneumatic screwdrivers, pneumatic screwdrivers, Electric drills, pneumatic drills, hand screwdrivers and other tools, ETC. 3 * black drill bit holder: 1/2" hex shank magnetic extension chuck adapter. 4 inch quick release, quick release lever socket screwdriver bit holder