850 piece screw pack containing a selection of various screw lengths in a heavy duty plastic carry case. Fine thread Size=No.6 (3.4 mm) x 25 mm Material=Steel Finish=Zinc coated Size=No.7 (3.9 mm) x 30 mm Material=Steel Finish=Zinc coated Coarse thread Size=No.7(3.9 mm) x 25 mm Material=Steel Finish=Zinc coated Size=No.7/8 (4.3 mm) x 30 mm Material=Steel Finish=Zinc coated Size=No.8 (4.3 mm) x 37 mm Material=Steel Finish=Zinc coated Size=No.8 (4.3 mm) x 50 mm Material=Steel Finish=Zinc coated Size=No.8 (4.3 mm) x 63 mm Material=Steel Finish=Zinc coated Dimensions: Fine screw size No.6 x25 mm & No.7 x 30 mm Coarse screw sizes No.7 x 25 mm, No.7/8 x 30 mm, No. 8 x 37 mm, No. 8 x 50 mm & No.8 x 63 mm.