Features:
1. Stainless Steel Locking Ball Ensures Se Fit
2. Sockets Snap-On Tightly & Won't Slip Off 1/4-inch
3. Hex Shank Prevents Stripping During High Speed Drill Operation
4. Super Strong Heat Treated Chrome Vanadium Steel for Normal & Impact
5. Use - sandblasted finish
6. Converts power drills into speedy socket drivers
7. Applies to the screwdriver handle or electric screwdriver tools (hexagonal hole or three jaw chuck can be)
8. Driven sleeve is used, can be the original hexagonal side after installation on size into square size, which can be used for the installation of the sleeve, is a good accessories to convert

Specification:
Material: chrome vanadium steel cr-v
Dimension: (approx.)
1/4" x 1/4" x 50mm--1/4 "shank can be converted into 6.35 mm square
3/8" x 1/4" x 50mm--1/4 "shank can be converted into 9.53 mm square
1/2" x 1/4" x 50mm--1/4 "shank can be converted into 12.7 mm square
Color: as picture shows
Note:
Please allow 1-5mm errors due to manual measurement