ONGUARD U-lock Pitbull Mini #8006 (security level 80 of 100) made of double rubber-coated hardened steel with Snap Lock Quick Release multiposition mounting bracket, incl. 5 laser cut keys (1 micro-light and 4 extra grip keys - micro-light key projects a bright white beam), dimensions: W 90mm x H 140mm x 14.0mm (diameter) (3.55" x 5.52" x 0.55"), weight: approx. 1.330g. The small u-lock fits in almost any bag, perfect for fast commuters or bike messengers who are weight sensitive. Very practical in case you have to leave the bike somewhere for a short time only or a firm and secure locking of the bike is not necessary for any other reason.