Each adapter piece is constructed of chrome vanadium steel to deliver on long-lasting strength and durability
Includes a 60mm long bit extension bar with magnetized ends to securely hold 1/4-inch bits
Bits are compatible with common to heavy duty power tools, drivers, hand wrench, and screwdriver handle tools for flexible uses
Spring loaded ball bearings on each square head securely locks deep into sockets to prevent slippage during use
Set includes (4) 1/4-inch, (2) 3/8-inch, and (2) 1/2-inch drive sizes and (1) magnetic bit extension piece with a 1/4-inch bit end