Type 1 Palm Button Hinge Lock Assembly for Little Giant Ladder 2″ center-to-center measurement on the outer pins Average delivery time: about 1-2 weeks! Authorized Dealer since 1989 The Little Giant Ladder Type 1 Palm Button Hinge Lock Assembly Kit is the most popular replacement part for older Little Giant Ladders. Fits Type 1 250lb rated, Type II 225lb rated (yellow ladder), a few Type 1A, Alta One, Ultra Step, Painters Ladder, TitanX, American Titan, Megalite, Legend, Velocity and some models of fiberglass Little Giant Ladders. 2″ center-to-center measurement on the outer pins. 3/4″ diameter center pin. If your Little Giant Ladder has an EXTERNAL spring on the hinge that is clearly visible then this is likely the hinge lock you’ll need. If your Little Giant Ladder has an INTERNAL spring on the hinge (not visible) then you likely need this hinge lock. Part number 31005. Supersedes old part numbers 30043, 30044 and 20157 (Type II). This genuine Little Giant Palm Button Hinge Lock Assembly Kit comes with the following items: Hinge Lock Assembly Plastic Palm Button External spring2 spacers Large snap ring Small snap ring Not compatible with any competitors ladder. Not compatible with most aluminum Type 1A, Type 1AA and some models of Fiberglass Little Giant Ladders. If your Little Giant Ladder has an EXTERNAL spring on the hinge that is clearly visible then this is likely the hinge lock you’ll need. I am a factory authorized Little Giant Ladder Dealer and have been selling Little Giants since 1989. I am VERY familiar with the product and I’m more than willing to help with any questions. I can also airmail this accessory to HI, AK, PR, GU, VI, or APO for $8 additional Priority Mail postage, however you MUST select the Priority Mail option during checkout or your item cannot be shipped. $23 additional postage to Canada. Average delivery time: about 1-2 weeks. Visa/MC/Disc/Amex or check/MO accepted. For questions, call 800-735-8281 on weekdays, 8:00 – 5:00 Mountain Time. Click here to check out my other ladder auctions.