500G Load-Bearing: This screwdriver bit holder is made of aluminum alloy and stainless steel with chrome-plated surface, which is rust-proof and anti-oxidation, lightweight, sturdy and durable for long-lasting use and carry drill tools up to 500 grams/1.1 lbs, not easy to drop. 360 Rotatable Design: The keychain features a flat, thick and round design for easy one-handed access to extension rods and bit changes. Easy to Install & Release: The lightweight bit holder is easy to install and release each bit. You can release hex shank bit holder with one hand. It adopts slide collar to unlock way to secure head. Lock release only works in one direction, preventing accidental removal. You simply pull the colored cylinder off the base, then slide the bit in and release the cylinder. Avoid Tool Dropping: The product adopts smooth surface, pull-out bushing, which avoid tool accidental dropping and facilitate working at heights. The recessed design of extension rod is convenient to hold and replace the drill bit, prevent tools from accidentally falling and facilitate high-altitude operations, bringing a pleasant use experience. Easy to Carry: This 1/4inch hex shank bit holder is quick to change bits and fix bits. The pull-out bushing bit holder can replace the large box that usually holds the cutter head. The bit holder is easy to organize and track of chucks and drill bits. It is a practical tool for electricians, handymen, construction workers, craftsmen, carpenters and mechanics. Widely Uses: Universal 1/4-inch quick hexagonal shank and 1/4-inch hexagon socket, convenient for using different commonly used 1/4 bits. It is suitable for most electric drivers, hand drivers, hand-held screwdrivers and drill bits such as T25 and T20 drill bits, etc. Colour:As Shown Material:aluminum alloy Package Contents: 12 * 1/4 Inch Hex Shank Screwdriver Bit Holder Key Chain Only the above package content, other products are not included. Note: Light reflection 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.