Profile of the key - paracentric to prevent picking and extended keyneck to allow the use of security accessories. Pins - special security pins with wings and 2 tips per pin for enhanced securit. Protected key blanks - patented to ensure keys cannot be duplicated by unauthorised parties. Precision engineered using high quality materials. Purpose built - a variety of cylinder shapes so one masterkey system can cover different applications. Proven technology - all backed up by ASSA's considerable experand enviable reputation. All products in this series are EN 1303 approved.