FACOM 1/2 Inch Connection Piece for Screw Inserts, Pack of 1, S.236

Amazon

Square: 12 Connector with spring ring for bits D : 516 Output: inner hexagonal 8 mm (516) International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions., Weight: 0.05 pounds, Manufacturer: BLAMT

Zoro Tools

1/2" drive spring clips for holding bits in place. To ISO1173, DIN 3126 and NF ISO 1173.S.236: size 5/16", length 26mm, weight 54g.S.237: size 1/2", length 44mm. weight 70g.