Proto J4995 13 Piece Round Head Hex Key Set
https://www.sawab.app/shop/j4995-proto-j4995-13-piece-round-head-hex-key-set-1421
https://www.sawab.app/web/image/product.template/1421/image_1920?unique=b300c89
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Ball end can tighten or loosen screws at angles up to 25°.