10 stainless steel double expansion bolts 8 X 76 mm

Diameter: 8 mm. Length: 76 mm. Stainless steel. The principle advantage of male bolts is that the hole drilled is the same as the bolt diameter, which takes about 40% less energy (or battery power) than drilling a hole for same-sized self-drilling anchor. Stainless steel sleeve ensures a much longer life in comparison to the competition. Nuts and washers included. 8-mm bolts are for caving use only; 10-mm and larger may be used for climbing. Sold in sets of 10.