Features 1、With a high‑accuracy concentric shaft, the screws can be accurately locked when used without slipping. 2、The bit head and the screw bite tightly and firmly, not easy to slip, and the operation is more efficient. 3、With magnetic adsorption, it can easily adsorb screws or small parts in the corners. 4、These screwdriver bits can be used with electric screwdrivers, electric drills, pneumatic tools and any other standard tools. 5、The kit contains 12 screwdriver bits of different sizes, suitable for different maintenance situations. Specification Item Type: Cross Bit Interface Diameter: Approx. 4mm / 0.2in Product Quantity: 12pcs Product Length: Approx. 40mm / 1.6in Uses: Household use, decoration use, maintenance use, industrial use Model Interface Diameter Head Length Head Diameter 4 x 40 x 1.2 x 20 x 00# Approx. 4mm / 0.2in Approx. 20mm / 0.8in Approx. 1.2mm / 0.05in 4 x 40 x 1.4 x 20 x 00# Approx. 4mm / 0.2in Approx. 20mm / 0.8in Approx. 1.4mm / 0.1in 4 x 40 x 1.6 x 20 x 00# Approx. 4mm / 0.2in Approx. 20mm / 0.8in Approx. 1.6mm / 0.06in 4 x 40 x 1.7 x 20 x 00# Approx. 4mm / 0.2in Approx. 20mm / 0.8in Approx. 1.7mm / 0.07in 4 x 40 x 1.8 x 20 x 00# Approx. 4mm / 0.2in Approx. 20mm / 0.8in Approx. 1.8mm / 0.07in 4 x 40 x 2.0 x 20 x 00# Approx. 4mm / 0.2in Approx. 20mm / 0.8in Approx. 2.0mm / 0.08in 4 x 40 x 2.5 x 20 x 0# Approx. 4mm / 0.2in Approx. 20mm / 0.8in Approx. 2.5mm / 0.1in 4 x 40 x 2.5 x 20 x 1# Approx. 4mm / 0.2in Approx. 20mm / 0.8in Approx. 2.5mm / 0.1in 4 x 40 x 3. 0 x 20 x 0# Approx. 4mm / 0.2in Approx. 20mm / 0.8in Approx. 3.0mm / 0.12in 4 x 40 x 3. 0 x 20 x 1# Approx. 4mm / 0.2in Approx. 20mm / 0.8in Approx. 3.0mm / 0.12in 4 x 40 x 1# Approx. 4mm / 0.2in Approx. 4.0mm / 0.16in 4 x 40 x 2# Approx. 4mm / 0.2in Approx. 4.0mm / 0.16in Package List 12 x Cross Bit