1. 31 in 1 hardware set is a great tool for home or professional repair work to use. 2. With nonslip handle for easy operation. 3. You can replace the bits conveniently as multi-bits for you to choose. 4. Holder case is easy to carry with you, for anytime and anywhere you need to use. 5. Professional tools fit most circumstances. Specification: Product Name: 31 in 1 Screwdrivers Set Material: Plastic, Metal Color: Silver Tone, Red, Black, Yellow Weight: 159g Bit Holder Size: 10.2 x 2.5cm / 4.02-inch x 1-inch(L*D) Holder Case Size: 12 x 5.5cm / 4.8-inch x 2.2-inch(H*D) Torx: T3, T4, T5, T6, T7, T8, T9, T10, T15, T20 Hex: H1.3, H1.5, H2.0, H2.5, H3.0, H4.0 Slotted: 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm Phillips: 1.7mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm Tri-wing: 3.0mm Triangle: 3.0mm Pectangle: 2.0mm U Shape: U2.6 Package Content: 1 x Bit Holder, 30pcs x Bits, 1 x Holder Case