Size: total length: 10.4 cm, body diameter: 3/4 inch. 1/2 round rod converter. Screw : M13 x 15mm Application: Adapter connects the drill to an auger. Material: The garden electric drill adapter is made of durable steel with 4 flat bits on the shank 3/4inch to match your hammers chuck teeth. Compatibility: Fits 1/2inch and larger chucks. What You Get: 1 auger adapter. Total length: 10.4 cm. Body diameter: 1.9 cm. Stem: 1/2inch diameter x 1.7inch length / 3 x 4.3cm Suitable for hammer drill. Application: the adapter connects the drill to the auger. Note: If this adapter needs to work with a threaded locker when its there for reverse motion, you can still use a thread locker on the screw holding the two pieces together to solve this problem. Electric Auger Drill Adapter is made of durable steel, it provides longer service life, sturdy and durable. It has 2 flats on the 3/8inch shank to match the chuck teeth of your cordless drill. Features: / Material: steel Total length: 10.4cm 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 1/2inch thread adapter for drill chuck. Contents: 1 adapter for auger electric drill.