The sockets in this set are designed to fit into the corresponding bits, ensuring a secure and tight fit. This feature is especially important when working with fasteners that require a specific size and type of socket. The bits in this set are also designed to fit into the corresponding sockets, providing a secure and tight fit that prevents slippage and damage to the fastener.The set includes both metric and imperial sockets and bits, making it suitable for use in both metric and imperial systems. This feature provides versatility and flexibility, making it a useful tool for both professionals and DIY enthusiasts. The set is also made of durable materials, ensuring that it can withstand heavy use and last for a long time.Overall, this set of 41 pieces of socket and bit set is a comprehensive and versatile tool that can be used for various tasks. With a range of sizes and types of sockets and bits, this set offers a wide range of options for different types of fasteners and bolts. The set is also made of durable materials, ensuring that it can withstand heavy use and last for a long time.SET CONTAINS: 1X 3 WAY REVERSIBLE RATCHET DRIVER . 1X 1/4 DRIVE ADAPTER 1X 4 MAGNETITE NUT-SETTERS . 3X SLOTTED BITS 5. 6.7mm 7X STAR BITS: T-10, T-15,T-20, T-25, T-27.T-30, T-40 7X SAE 1/4 DRIVE SOCKETS 3/16, 1/4. 5/16, 11/32, 3/8,7/16, 1/2 7X METRIC 1/4 DRIVE SOCKETS: 6, 7, 8, 9, 10, 11,12mm 3X PHILLIPS TYPE BITS #1. #2. #3 . 2X ROBERTSON BITS #1. #2 8x HEX BITS 1.5, 2, 2.5, 3, 4, 5, 5.5,6mm . 1X BLOW MOLD CASEThis set of 41 pieces of socket and bit set is a versatile and comprehensive tool that can be used for various tasks. The set includes both sockets and bits, providing a range of options for different types of fasteners and bolts. With 41 pieces in total, this set offers a wide range of sizes and types of sockets and bits, making it a useful addition to any toolbox.