Check the listing for details. ENCO # 340 Magnetic Base, Snug, & Arm, Fine Adjust, Holds Upside Down WP185. Condition: Used. Listed at 39.95 USD. The ENCO #340 Magnetic Base, Snug, & Arm is a precision tool designed for metalworking inspection and measurement tasks. Made in Japan, this magnetic holder features fine adjustment capabilities, allowing it to securely hold items in place even when positioned upside down. The strong magnetic base ensures stability during use, making it a reliable tool for CNC, metalworking, and manufacturing applications. Perfect for industrial settings, this ENCO magnetic holder offers versatility and ease of use for various tasks requiring precise positioning and measurement.