梅花螺丝刀规格型号,梅花螺丝刀T5

电动螺丝刀头s2批咀t1t2t3t4t5t6t7t8六角起子头梅花批头t9t106星
梅花螺丝刀 六角星型套装米字形扳手t8t9t10t15t20t25带中孔六棱
星形梅花螺丝刀内六角米字中空起子t6t8t9t10t15t20t25t27t30带孔全套
内六花的规格是什么意思呢?比如t5的直径才0.81mm怎么算的呢?
力山梅花螺丝刀批中间带孔t5t6t7t8t9t10t15t20t25t27t30星形六角