Essentra Components (Richco) CRLCBSRE-4-01 Board Support Snap Lock (Bag of 1000) | eBay
1/2" dia. x 1/2" Lg., Tap - #10-24 x 1/4" dp., Max. pull - 5.3 lbs., One Pole Cyl. Magnet in an Alum: Lifting Accessories: Amazon.com: Industrial & Scientific
Buy Pneumatic Cylindrical Hold Down Clamps | TC-807-U | Reid Supply