Socket size guide: M6 - 10mm, M8 - 15mm, M10 - 17mm, M12 - 19mm. Box Contains 10 x Masonry Anchor Projection Bolt HEX BOLTS-HIGH TENSILE-M6 x 50mm-GRADE 10.9 - Champion Fasteners Tough and reliable construction. Product Description Heavy-duty anchor bolt fixing. M6 x 50mm T30 Torx Low Cap Head (ISO 14580) - Thread Locking - Anu-Lock 180 Stainless Steel HIGH TENSILE HEX BOLTS & NUTS M6 x 50MM - Hardware Special retaining spring, ensures encapsulation of the wedge during expansion. Suitable for usewhere fixtures require placing over the stud which include wall fixing, overhead and ceiling applications. Ideal for fixing racking, machinery, trunking, pipework and switchgear Masonry Anchor Bolts PROJECTING BOLT M6 X 50mm APB0650 Zinc Coated Projection Bolts Also suitable for external applications including fencing and joinery structures