1Applicable Material: This set is suitable for drilling materials that are not too hard, such as wood, thin iron sheet and aluminum plate, not for cement, steel plate and other hard materials. 2Rust Proof: The kit includes round shank extension rod, hex shank extension rod and electric wrench adapter, all of which have rust proof finish, with longer service life. 3Wide Compatibility: The drill adapter kit is applicable to most brands of screwdrivers, impact wrenches, hammer drills and some angle polishers in the market, such as for Bosch, for Dremel, for Kobalt, etc. 4Precise Size: The chuck and adapters are precisely manufatured, with precise thread and size, ensure perfect and firm connection. 5Easy Carrying: Compact in size and light in weight, this set is very easy to put into your tool bag and convenient to carry around. Item Type: Drill Chuck Adapter Set Material: Plastic Chuck Specification: Approx. 10mm or 0.39in Round Shank Connection Rod Thread: Approx. 9.5x12.5mm or 0.37x0.49in Electric Wrench Adapter and Hex Connection Rod Thread: Approx. 9.5x15mm or 0.37x0.59in Electric Wrench Adapter Shank Length: Approx. 45mm or 1.77in Hex Connection Rod Shank Length: Approx. 27mm or 1.06in 1 x Drill Chuck 1 x Electric Wrench Adapter 1 x Hex Shank Connection Rod 1 x Round Shank Connection Rod Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.