Spyder Climb Right Aluminum Spurs are lighter than steel climbers while maintaining high strength. Made by Spyder Manufacturing with a straight shank from tempered aluminum. The bottoms of the climbers are textured for better grip when walking on tree limbs. The gaffs are made in Spyder�s new �Quick Change� style, with a two- screw design that lets you switch or replace gaffs quickly. The top screw is fully threaded through the gaff, giving the operator a visual guarantee the gaff is completely tightened to the climbing stirrup. Choose the right combination for your climbing needs. Climb Right recommends a combined body, clothing and tool weight of 350 lbs