Made from S2 modified shock resistant steel for professional performance and durabilityProprietary precision CNC machined tips for excellent fit in fastener recessDurable metal storage caseIncludes: 1/4" x 1/4" socket adapter, Y-adapter, Quick-release bit holder, Quick-release screwdriverIncludes Phillips bits: #1, #2, #3Includes square bits: #1, #2, #3Includes Torx® bits: 8, 10, 15, 20, 25, 27, 30, 40Includes Torx® Tamper bits: 8, 10, 15, 20, 25, 27, 30, 40Includes hex tamper proof bits: 7/64", 1/8", 5/32", 3/16", 7/32", 1/4", 5/16"Includes spanner bits: #4, #6, #8, #10, #12Includes Tri-Wing® bits: #2, #3, #4, #5Includes Torq-Set® bits: #6, #8, #10, 1/4"Includes clutch head bits: 5/32", 3/16", 1/4"Includes triple square bits: #5, #6, #8Includes 1/4" square drive socket: 1/4"