Master Lock Wide Set Combination Lock Black. 646D Set Your Own Combination Padlock features a 13/16 in. (20mm) wide metal body for durability. The shackle is 1/8 in. (3mm) diameter 11/16 in. (17mm) long and made of steel offering resistance to cutting and sawing. The 3-dial combination security offers keyless convenience. Specifications for Master Lock 646D Wide Set Combination Lock Black: Mfg Item Num: 646D Supplier SKU: 09203 Category: ACCESSORIES MISCELLANEOUS Model Fit: N/A Type: Lock Model or Style: Combination Color: Black Size: 21mm W Material: Steel Heating Area: N/A Mount: Shackle Battery: N/A The Master Lock 646D Wide Set Combination Lock Black is a quality addition to the Master Lock lineup. For more great deals on Locks by Master Lock please browse our Master Lock Locks page.