Feature●Includes 4-pc. 1/4 in. drive slotted bit sockets: 1/8, 3/16, 1/4, 5/16 in.; 4-pc. 1/4 in. drive Phillips bit sockets: #0, #1, #2, #3; Socket rail●S2 steel bit is press-fit into the socket for a straight, permanent connection that cant loosen over time●Bits tips are machined to precise tolerances for strong engagement with fastener heads●Large, clear die-stamped size marking is easy to read and can’t wear off●Four detent grooves provide a secure connection with the drive toolDescription TEKTON S2 steel bits are press-fit into the socket for a straight, permanent connection that cant loosen over time. The tips are machined to exact tolerances for precise engagement with fasteners. The set includes Phillips and Slotted bits as well as a Twist-to-Lock Socket Rail that keeps the sockets securely organized.