Sufficient supplies: the package comes with 10 square socket adapter bits, sufficient quantity can meet your and replacement. Apply to: this hex socket adapter is especially designed to be applied as a plug-in handle when manually driving applications or with power tools; The total length is about 6.5 cm/ 2.6 inch, easy to carry and store. Material: featuring quenched high-speed steel material, the socket bit adapter is sturdy, smooth, with high strength, and can be applied for a long time; The size of the square tip is about 10 mm/ 3/8 inch, and the size of the hexagonal handle is about 6.3 mm/ 1/4 inch; Before placing an order, please confirm the size to avoid an unpleasant shopping experience. Double size conversion: 10 mm hex impact socket can convert the hexagonal polygon size to square size, so you can use it to install the socket; It is a nice accessory for conversion, which improves work efficiency and brings many conveniences. Bearing design: each square of the 3/8 socket adapter has a spring ball bearing part, which can effectively fix the socket and avoid sliding. Colour: Silver Grey Material: HSS Package Contents: 10 * Square socket adapter bits Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.