Koken RS4129/5-L37 Bolt Twister Rail Set, Total Length 1.5 inches (37 mm), Set of 5

1/2 (12.7 mm) SQ. Bolt Twister Rail Set, Total Length 1.5 inches (37 mm), Set of 5 Standard: RS4129/5-L37 Set Includes: Rail set (rail 5.9 inches (150 mm) / 0.3 inch (8 mm), 0.3 inch (10 mm), 0.5 inch (12 mm), 0.5 inch (14 mm), Weight: 12.5 oz (370 g)