We have linked the name and cosmetics of this reel to the famous original 506 The 706 was proved to be the best selling UK ABU reel for several years and by using our engineers and consultants we have made some key changes to improve the reel further and becoming 506 MKII! - New handle assembly is more secure and the Syncro drag is more efficient (added carbon washers) - Improved gear components have made the reel feel smoother and more powerful - Improved the gear lock design - now the pin secures the gear without damaging it - Added arrow on the reel rotor to help show the correct direction to remove - Improved the push button/pin release mechanism. Is now more positive and reliable - same original 506 - New ceramic coated line pin that reduces wear and increases winching power - Improved the chenille quality so it works correctly