Double set screw with Allen wrench. Recommended for all 1/4″ round shank drill bits requiring extra reach. Follows 5/8″ and larger bits through hole. 1/4″ shank. Only fits round shank Speedbor or Do it Best brand bits. No. 88702: Length: 6 In., Shank Diameter: 1/4 In. Hex, Individual/Set: Individual, Pkg Qty: 1, Package Type: Card No. 88601: Length: 12 In., Shank Diameter: 1/4 In. Hex, Individual/Set: Individual, Pkg Qty: 1, Package Type: Card
