以下开放式和封闭式驱动棘轮支架的尺寸、尺寸、材料:长头（箱）、短头、超短头（销支架）、短头重型（锅炉支架）、钻头。与支架一起使用的钻柱尺寸。用于带有莫氏锥或方锥柄的钻头，必要时使用适配器，包括转换细节。交叉引用:BS 51BS 328BS 427BS 970

Sizes, dimensions, material, for following open and enclosed drive ratchet braces: long head (box), short head, extra short head (pin brace), short head heavy duty (boiler brace), bit stock. Dimensions of drilling pillars for use with braces. For use with drills having Morse taper or square taper shanks, when necessary employing an adaptor, conversion details of which are included.Cross References:BS 51BS 328BS 427BS 970