Size: about 2.5 10mm(20pcs), 3 12mm(20pcs), 3 16mm(20pcs), 3 20mm(20pcs), 3.5 16mm(10pcs), 3.5 20mm(10pcs), 4 20mm(10pcs), 4 25mm(10pcs), 4 30mm(10pcs), 4 35mm(10pcs), 4 40mm(10pcs), 4 45mm(10pcs). The top of the screw has a standard cross groove, which is evenly stressed, easy to lock, not easy to slip, and more convenient and quick to use.
