Size: 4" overall length, 3/4" body diameter. Compatibility: Fits 10mm diameter round rod to 1/2 thread adapter for drill chuck. Application: The adapter connects the drill to the auger. Note: If this adapter is to work with a threaded locker when it's there for movement reverse, you can always use a thread locker on the screw holding the two parts together to solve this problem. Description: The electric auger drill adapter is made of durable steel, it provides longer service life, sturdy and durable. It has 2 flats on the 3/8" shank to match the chuck teeth of your cordless drill. Features : Material: steel Total length: 4.1" Body Diameter: 1.9 cm Stem: 0.8cm diameter x 4.3cm length. Compatible with corded drills and cordless drills. 10mm diameter round shank to 1/2 thread adapter for drill chuck. Noticed : We always do our best to provide customers with quality products. If you have any product problems, please contact us by email, we will get back to you in time. Content : 1 x Auger Electric Drill Adapter. Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference in light and display, there will be a certain color difference, depending on the physical object received Delivery Quantity: (according to the main picture)