Product contains-1.5mm-1.7mm- 2.0mm SLOTTED BI-MATERIAL HANDLE.The Screw Driver Set is a classic screwdriver set that comes with 3 different sized flat & head screwdrivers- making it ideal for home and professional use. Made from high-quality chrome vanadium steel- the handles are designed for long lasting use. The hardware tools feature strong magnetic tips- allowing it to hold small parts while working. Flat blade model has a flat blade and can be used for most general fastening and removal jobs. This is a great set for all light to medium duty applications- where one needs high precision and quality tools. Precision-milled screwdriver shafts maintain close tolerances for better surface contact and faster driving speeds. Textured grips offer improved comfort & increased torque output. Skid-proof hex shanks prevent slipping from any angle while ensuring a firm grip on screws while they are being inserted or removed.