... .5,T5,T10,T20Bore types: SB,TB,QDFeatures:1. Teeth Type: MXL,XL,L,H,XH,XXH,XXL,SL9,SL12,SL ... ,HTD:3M,5M,8M,14M,20M AND SO ON2. Metric System: T-type series(T2.5,T5,T10,T20)3. HTD ... ,8M,14M)4. STPD/STS type(S2M,S3M,S4.5M,S5M,S8M, S14M)5. The British System:MXL,XL,L,H,X6 ...