Specification : The bell-shape and magnetic hex insert allow the bit to hold the bit securely in place for quicker installations. Designed and engined for long life and good durability for operating. Used in manufacturing assembly systems and others. Fits all power drills, screw guns, cordless and amp, magnetic drivers sandblasted, chrome vanadium steel bits. Quick release hex shank will save you time. Type: Magnetic Nut Driver Socket Adapter Material: Chrome Vanadium Steel Alloy Quantity: 1 Pc Features: Useful, Convenient to Use, Durable, Power Tools Size Type: 6mm/0.24", 7mm/0.28", 8mm/0.31", 10mm/0.39", 12mm/0.47", 13mm/0.51", 14mm/0.55", 15mm/0.59", 17mm/0.67", 19mm/0.75" (Approx.) Inner Hex: 5mm - 19mm/0.20" - 0.75" (Approx.) Length: 65mm/2.56" (Approx.) Shank Size: 1/4 Inch Notes: This is sold by piece, not by set, please choose the size you need. Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Included: 1 x Magnetic Nut Driver Socket Adapter