The drill extension kit is made of high-quality industrial-grade heavy-duty carbon steel. Set of drill including 1 x Screwdriver Bits Holder Set(6pcs 1/4 hex shank handle keychain extension rod with a black metal hanging buckle)2 x flexible drill extension, 1 x 105° right-angle drill bit extension, 3 pieces of (1/2, 3/8,1/4) universal socket adapter kit, 3 x quick release magnetic drill extension Pieces, 10 in 1 set combination screwdriver bit set, , and can be used for a long time. Bits hold/quick change, Can avoid accidental dropping of tools and facilitate high-altitude operations.Application--Universal 1/4inch quick hex shank and 1/4inch hex socket keep different commonly used 1/4 bits handy. Fit most electric drivers, hand-held drivers and bits, like t25 and t20 bits etc.Large Load-- cancarry bits tools up to 500g in weight. To keep the drill bits not easy to fall.It is made of aluminum alloy, nice durability, , sturdy, which their . 105° Bend Narrow Space Available--Use in which