Gardeningwill Pack of 5 M6 304 Stainless Steel Expansion Screw Open Cup Hook Archor Bolts Professional standard expansion bolts open up hook. Ideal for garage workshop,builders,Joiners and home DIY etc. Are available in anchor body,with hex bolt,with thread rod,with forging hook bolt,with forging eye bolt. The purpose of a secure and reliable fixing of items and fixtures to concrete,brick,walls any solid surface really of heavy items and fitments. Size : 9.5 x 0.9cm / 3.7" x 0.35" (L*Dia). Static load capacity: 220lb(100kg)